Add rule for pod2man to the makefile. Update the man page.

Makefile

@@ -1,7 +1,10 @@
 include $(THEOS)/makefiles/common.mk
 include $(THEOS_MAKE_PATH)/null.mk
 
-after-stage::
+dm.pl.1: dm.pl
+	$(ECHO_COMPILING)pod2man $^ $@$(ECHO_END)
+
+after-stage:: dm.pl.1
 	$(ECHO_NOTHING)mkdir -p $(THEOS_STAGING_DIR)/usr/bin $(THEOS_STAGING_DIR)/usr/share/man/man1$(ECHO_END)
 	$(ECHO_NOTHING)cp dm.pl $(THEOS_STAGING_DIR)/usr/bin/dm.pl$(ECHO_END)
 	$(ECHO_NOTHING)ln -s dm.pl $(THEOS_STAGING_DIR)/usr/bin/dm$(ECHO_END)

dm.pl.1

@@ -1,4 +1,4 @@
-.\" Automatically generated by Pod::Man 4.09 (Pod::Simple 3.35)
+.\" Automatically generated by Pod::Man 4.10 (Pod::Simple 3.35)
 .\"
 .\" Standard preamble:
 .\" ========================================================================
@@ -54,16 +54,20 @@
 .\" Avoid warning from groff about undefined register 'F'.
 .de IX
 ..
-.if !\nF .nr F 0
-.if \nF>0 \{\
-.    de IX
-.    tm Index:\\$1\t\\n%\t"\\$2"
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+.    if \nF \{\
+.        de IX
+.        tm Index:\\$1\t\\n%\t"\\$2"
 ..
-.    if !\nF==2 \{\
-.        nr % 0
-.        nr F 2
+.        if !\nF==2 \{\
+.            nr % 0
+.            nr F 2
+.        \}
 .    \}
 .\}
+.rr rF
 .\"
 .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
 .\" Fear.  Run.  Save yourself.  No user-serviceable parts.
@@ -129,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "DM 1"
-.TH DM 1 "2017-12-06" "perl v5.26.1" "User Contributed Perl Documentation"
+.TH DM 1 "2019-01-13" "perl v5.28.1" "User Contributed Perl Documentation"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -149,7 +153,7 @@ This option exists solely for compatibility with dpkg-deb.
 Specify the package compression type. Valid values are gzip (default), bzip2, lzma, xz and cat (no compression.)
 .IP "\fB\-z<compress\-level>\fR" 8
 .IX Item "-z<compress-level>"
-Specify the package compression level. Valid values are between 0 and 9. Default is 9 for bzip2, 6 for others. 0 is identical to 1 when using bzip2. Refer to \fB\f(BIgzip\fB\|(1)\fR, \fB\f(BIbzip2\fB\|(1)\fR, \fB\f(BIxz\fB\|(1)\fR for explanations of what effect each compression level has.
+Specify the package compression level. Valid values are between 0 and 9. Default is 9 for bzip2, 6 for others. 0 is identical to 1 when using bzip2 and gzip. Refer to \fB\fBgzip\fB\|(1)\fR, \fB\fBbzip2\fB\|(1)\fR, \fB\fBxz\fB\|(1)\fR for explanations of what effect each compression level has.
 .IP "\fB\-\-help\fR, \fB\-?\fR" 8
 .IX Item "--help, -?"
 Print a brief help message and exit.