docs: Comment out recently added doxygen options

These would create warnings when running with a slightly older
doxygen version. The set values were anyway the default values,
with the exception of TIMESTAMP: For some reason, running
doxygen -u in commit a9e6cab gave it the non-default YES
value.

Signed-off-by: Tormod Volden <[email protected]>

doc/doxygen.cfg.in

@@ -90,7 +90,7 @@ CREATE_SUBDIRS         = NO
 # Minimum value: 0, maximum value: 8, default value: 8.
 # This tag requires that the tag CREATE_SUBDIRS is set to YES.
 
-CREATE_SUBDIRS_LEVEL   = 8
+#CREATE_SUBDIRS_LEVEL   = 8
 
 # If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
 # characters to appear in the names of generated files. If set to NO, non-ASCII
@@ -362,7 +362,7 @@ TOC_INCLUDE_HEADINGS   = 5
 # The default value is: DOXYGEN.
 # This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
 
-MARKDOWN_ID_STYLE      = DOXYGEN
+#MARKDOWN_ID_STYLE      = DOXYGEN
 
 # When enabled doxygen tries to link words that correspond to documented
 # classes, or namespaces to their corresponding documentation. Such a link can
@@ -494,7 +494,7 @@ NUM_PROC_THREADS       = 1
 # Possible values are: YES, NO, DATETIME and DATE.
 # The default value is: NO.
 
-TIMESTAMP              = YES
+#TIMESTAMP              = YES
 
 #---------------------------------------------------------------------------
 # Build related configuration options
@@ -639,7 +639,7 @@ HIDE_COMPOUND_REFERENCE= NO
 # will show which file needs to be included to use the class.
 # The default value is: YES.
 
-SHOW_HEADERFILE        = YES
+#SHOW_HEADERFILE        = YES
 
 # If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of
 # the files that are included by a file in the documentation of that file.
@@ -857,7 +857,7 @@ WARN_IF_DOC_ERROR      = YES
 # parameters have no documentation without warning.
 # The default value is: YES.
 
-WARN_IF_INCOMPLETE_DOC = YES
+#WARN_IF_INCOMPLETE_DOC = YES
 
 # This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that
 # are documented, but have no documentation for their parameters or return
@@ -875,7 +875,7 @@ WARN_NO_PARAMDOC       = NO
 # will automatically be disabled.
 # The default value is: NO.
 
-WARN_IF_UNDOC_ENUM_VAL = NO
+#WARN_IF_UNDOC_ENUM_VAL = NO
 
 # If the WARN_AS_ERROR tag is set to YES then doxygen will immediately stop when
 # a warning is encountered. If the WARN_AS_ERROR tag is set to FAIL_ON_WARNINGS
@@ -912,7 +912,7 @@ WARN_FORMAT            = "$file:$line: $text"
 # See also: WARN_FORMAT
 # The default value is: at line $line of file $file.
 
-WARN_LINE_FORMAT       = "at line $line of file $file"
+#WARN_LINE_FORMAT       = "at line $line of file $file"
 
 # The WARN_LOGFILE tag can be used to specify a file to which warning and error
 # messages should be written. If left blank the output is written to standard
@@ -953,7 +953,7 @@ INPUT_ENCODING         = UTF-8
 # form: pattern=encoding (like *.php=ISO-8859-1). See cfg_input_encoding
 # "INPUT_ENCODING" for further information on supported encodings.
 
-INPUT_FILE_ENCODING    =
+#INPUT_FILE_ENCODING    =
 
 # If the value of the INPUT tag contains directories, you can use the
 # FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
@@ -1112,7 +1112,7 @@ USE_MDFILE_AS_MAINPAGE =
 # be processed before the automatic comment starts.
 # Minimum value: 7, maximum value: 10000, default value: 72.
 
-FORTRAN_COMMENT_AFTER  = 72
+#FORTRAN_COMMENT_AFTER  = 72
 
 #---------------------------------------------------------------------------
 # Configuration options related to source browsing
@@ -1365,7 +1365,7 @@ HTML_EXTRA_FILES       =
 # The default value is: AUTO_LIGHT.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_COLORSTYLE        = AUTO_LIGHT
+#HTML_COLORSTYLE        = AUTO_LIGHT
 
 # The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
 # will adjust the colors in the style sheet and background images according to
@@ -1421,7 +1421,7 @@ HTML_DYNAMIC_SECTIONS  = YES
 # The default value is: YES.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_CODE_FOLDING      = YES
+#HTML_CODE_FOLDING      = YES
 
 # With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
 # shown in the various tree structured indices initially; the user can expand
@@ -1464,7 +1464,7 @@ DOCSET_FEEDNAME        = "Doxygen generated docs"
 # (such as a company or product suite) can be grouped.
 # This tag requires that the tag GENERATE_DOCSET is set to YES.
 
-DOCSET_FEEDURL         =
+#DOCSET_FEEDURL         =
 
 # This tag specifies a string that should uniquely identify the documentation
 # set bundle. This should be a reverse domain-name style string, e.g.
@@ -1561,7 +1561,7 @@ TOC_EXPAND             = NO
 # protocol see https://www.sitemaps.org
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-SITEMAP_URL            =
+#SITEMAP_URL            =
 
 # If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
 # QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that
@@ -1685,7 +1685,7 @@ GENERATE_TREEVIEW      = NO
 # The default value is: NO.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-FULL_SIDEBAR           = NO
+#FULL_SIDEBAR           = NO
 
 # The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
 # doxygen will group on one line in the generated HTML documentation.
@@ -1716,7 +1716,7 @@ EXT_LINKS_IN_WINDOW    = NO
 # The default value is: YES.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-OBFUSCATE_EMAILS       = YES
+#OBFUSCATE_EMAILS       = YES
 
 # If the HTML_FORMULA_FORMAT option is set to svg, doxygen will use the pdf2svg
 # tool (see https://github.com/dawbarton/pdf2svg) or inkscape (see
@@ -1764,7 +1764,7 @@ USE_MATHJAX            = NO
 # The default value is: MathJax_2.
 # This tag requires that the tag USE_MATHJAX is set to YES.
 
-MATHJAX_VERSION        = MathJax_2
+#MATHJAX_VERSION        = MathJax_2
 
 # When MathJax is enabled you can set the default output format to be used for
 # the MathJax output. For more details about the output format see MathJax
@@ -2261,23 +2261,23 @@ GENERATE_AUTOGEN_DEF   = NO
 # database with symbols found by doxygen stored in tables.
 # The default value is: NO.
 
-GENERATE_SQLITE3       = NO
+#GENERATE_SQLITE3       = NO
 
 # The SQLITE3_OUTPUT tag is used to specify where the Sqlite3 database will be
 # put. If a relative path is entered the value of OUTPUT_DIRECTORY will be put
 # in front of it.
 # The default directory is: sqlite3.
 # This tag requires that the tag GENERATE_SQLITE3 is set to YES.
 
-SQLITE3_OUTPUT         = sqlite3
+#SQLITE3_OUTPUT         = sqlite3
 
 # The SQLITE3_OVERWRITE_DB tag is set to YES, the existing doxygen_sqlite3.db
 # database file will be recreated with each doxygen run. If set to NO, doxygen
 # will warn if an a database file is already found and not modify it.
 # The default value is: YES.
 # This tag requires that the tag GENERATE_SQLITE3 is set to YES.
 
-SQLITE3_RECREATE_DB    = YES
+#SQLITE3_RECREATE_DB    = YES
 
 #---------------------------------------------------------------------------
 # Configuration options related to the Perl module output
@@ -2485,7 +2485,7 @@ DOT_NUM_THREADS        = 0
 # The default value is: fontname=Helvetica,fontsize=10.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_COMMON_ATTR        = "fontname=Helvetica,fontsize=10"
+#DOT_COMMON_ATTR        = "fontname=Helvetica,fontsize=10"
 
 # DOT_EDGE_ATTR is concatenated with DOT_COMMON_ATTR. For elegant style you can
 # add 'arrowhead=open, arrowtail=open, arrowsize=0.5'. <a
@@ -2494,15 +2494,15 @@ DOT_COMMON_ATTR        = "fontname=Helvetica,fontsize=10"
 # The default value is: labelfontname=Helvetica,labelfontsize=10.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_EDGE_ATTR          = "labelfontname=Helvetica,labelfontsize=10"
+#DOT_EDGE_ATTR          = "labelfontname=Helvetica,labelfontsize=10"
 
 # DOT_NODE_ATTR is concatenated with DOT_COMMON_ATTR. For view without boxes
 # around nodes set 'shape=plain' or 'shape=plaintext' <a
 # href=https://www.graphviz.org/doc/info/shapes.html>Shapes specification</a>
 # The default value is: shape=box,height=0.2,width=0.4.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_NODE_ATTR          = "shape=box,height=0.2,width=0.4"
+#DOT_NODE_ATTR          = "shape=box,height=0.2,width=0.4"
 
 # You can set the path where dot can find font specified with fontname in
 # DOT_COMMON_ATTR and others dot attributes.
@@ -2668,7 +2668,7 @@ DIRECTORY_GRAPH        = YES
 # Minimum value: 1, maximum value: 25, default value: 1.
 # This tag requires that the tag DIRECTORY_GRAPH is set to YES.
 
-DIR_GRAPH_MAX_DEPTH    = 1
+#DIR_GRAPH_MAX_DEPTH    = 1
 
 # The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
 # generated by dot. For an explanation of the image formats see the section
@@ -2764,7 +2764,7 @@ DOT_GRAPH_MAX_NODES    = 50
 # Minimum value: 0, maximum value: 1000, default value: 0.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-MAX_DOT_GRAPH_DEPTH    = 0
+#MAX_DOT_GRAPH_DEPTH    = 0
 
 # Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
 # files in one run (i.e. multiple -o and -T options on the command line). This
@@ -2802,7 +2802,7 @@ DOT_CLEANUP            = YES
 # <outfile_format> -o <outputfile> <inputfile>. The external tool should support
 # output file formats "png", "eps", "svg", and "ismap".
 
-MSCGEN_TOOL            =
+#MSCGEN_TOOL            =
 
 # The MSCFILE_DIRS tag can be used to specify one or more directories that
 # contain msc files that are included in the documentation (see the \mscfile