doc: Rename VERSIONS to VERSIONS.md as it already has Markdown syntax

Closes #5325

docs/Makefile.am

@@ -83,7 +83,7 @@ EXTRA_DIST =                                    \
  THANKS                                         \
  TODO                                           \
  TheArtOfHttpScripting                          \
- VERSIONS
+ VERSIONS.md
 
 MAN2HTML= roffit $< >$@
 

packages/OS400/makefile.sh

@@ -53,7 +53,7 @@ fi
 for TEXT in "${TOPDIR}/COPYING" "${SCRIPTDIR}/README.OS400"             \
     "${TOPDIR}/CHANGES" "${TOPDIR}/docs/THANKS" "${TOPDIR}/docs/FAQ"    \
     "${TOPDIR}/docs/FEATURES" "${TOPDIR}/docs/SSLCERTS.md"              \
-    "${TOPDIR}/docs/RESOURCES" "${TOPDIR}/docs/VERSIONS"                \
+    "${TOPDIR}/docs/RESOURCES" "${TOPDIR}/docs/VERSIONS.md"             \
     "${TOPDIR}/docs/HISTORY.md"
 do      MEMBER="`basename \"${TEXT}\" .OS400`"
         MEMBER="`basename \"${MEMBER}\" .md`"