initial support & docs to bootstrap EOL releases

docs/chapters/subcommands/bootstrap.rst

@@ -27,7 +27,7 @@ release version as the argument.
 
 .. code-block:: shell
 
-  ishmael ~ # bastille bootstrap 12.4-RELEASE [update]
+  ishmael ~ # bastille bootstrap 14.0-RELEASE [update]
   ishmael ~ # bastille bootstrap 13.2-RELEASE [update]
 
 To `bootstrap` a HardenedBSD release, run the bootstrap sub-command with the
@@ -43,6 +43,21 @@ download the requested release. For each requested release, `bootstrap` will
 download the base.txz. These files are verified (sha256 via MANIFEST file)
 before they are extracted for use.
 
+EOL Releases
+------------
+
+It is sometimes necessary to run end-of-life releases for testing or legacy
+application support. Dy default Bastille will only install supported releases
+but you can bootstrap EOL / unsupported releases with a simple trick.
+
+.. code-block:: shell
+
+   ishmael ~ # export BASTILLE_URL_FREEBSD=http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/
+   ishmael ~ # bastille bootstrap 11.2-RELEASE
+
+By overriding the BASTILLE_URL_FREEBSD variable you can now bootstrap archived
+releases from the FTP archive.
+
 Tips
 ----
 

usr/local/share/bastille/bootstrap.sh

@@ -473,6 +473,11 @@ if [ -n "${OPTION}" ] && [ "${OPTION}" != "${HW_MACHINE}" ] && [ "${OPTION}" !=
     fi
 fi
 
+## allow override bootstrap URLs via environment variables
+[ -n ${BASTILLE_URL_FREEBSD} ] && bastille_url_freebsd="${BASTILLE_URL_FREEBSD}"
+[ -n ${BASTILLE_URL_HARDENEDBSD} ] && bastille_url_hardenedbsd="${BASTILLE_URL_HARDENEDBSD}"
+[ -n ${BASTILLE_URL_MIDNIGHTBSD} ] && bastille_url_midnightbsd="${BASTILLE_URL_MIDNIGHTBSD}"
+
 ## Filter sane release names
 case "${1}" in
 2.[0-9]*)
@@ -491,7 +496,7 @@ case "${1}" in
     ;;
 *-RELEASE|*-release|*-RC[1-9]|*-rc[1-9]|*-BETA[1-9])
     ## check for FreeBSD releases name
-    NAME_VERIFY=$(echo "${RELEASE}" | grep -iwE '^([1-9]{2,2})\.[0-9](-RELEASE|-RC[1-9]|-BETA[1-9])$' | tr '[:lower:]' '[:upper:]')
+    NAME_VERIFY=$(echo "${RELEASE}" | grep -iwE '^([0-9]{1,2})\.[0-9](-RELEASE|-RC[1-9]|-BETA[1-9])$' | tr '[:lower:]' '[:upper:]')
     UPSTREAM_URL="${bastille_url_freebsd}${HW_MACHINE}/${HW_MACHINE_ARCH}/${NAME_VERIFY}"
     PLATFORM_OS="FreeBSD"
     validate_release_url