Try to be more helpful to our users, and keep all the possible versions

close to their default value in Mk/bsd.default-versions.mk.

Sponsored by:	Absolight

Mk/Uses/firebird.mk

@@ -15,6 +15,8 @@ FIREBIRD_VER=	${firebird_ARGS}
 
 FIREBIRD_VER?=	${FIREBIRD_DEFAULT:S/.//}
 
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 .if ${FIREBIRD_VER} == 25
 LIB_DEPENDS+=	libfbclient.so:databases/firebird25-client
 .else

Mk/Uses/ghostscript.mk

@@ -28,6 +28,8 @@
 _INCLUDE_USES_GHOSTSCRIPT_MK=	yes
 
 # allowed versions
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 _GS_VERSION=	7 8 9 agpl
 
 _GS_ARGS=		${ghostscript_ARGS}

Mk/Uses/lua.mk

@@ -10,6 +10,8 @@
 .if !defined(_INCLUDE_USES_LUA_MK)
 _INCLUDE_USES_LUA_MK=	yes
 
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 _LUA_VALID_VERSIONS=	53 52 51
 
 .include "${PORTSDIR}/Mk/bsd.default-versions.mk"

Mk/Uses/perl5.mk

@@ -49,6 +49,8 @@ PERL5_DEPEND=	${PERL5}
 THIS_IS_OLD_PERL=	yes
 .else
 # end of remove
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 .include "${PORTSDIR}/Mk/bsd.default-versions.mk"
 .if ${PERL5_DEFAULT} == 5.18
 .include "${PORTSDIR}/lang/perl5.18/version.mk"
@@ -88,6 +90,8 @@ PERL_ARCH?=	mach
 # there must always be a default to prevent dependency failures such
 # as "ports/lang: not found".  Also, perl5-devel is taken care in the
 # perl5_default file, or up there in the default versions selection.
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 .if   ${PERL_LEVEL} >= 502200
 PERL_PORT?=	perl5.22
 .elif   ${PERL_LEVEL} >= 502000

Mk/Uses/pgsql.mk

@@ -31,6 +31,8 @@ _INCLUDE_USES_PGSQL_MK=	yes
 #	to add dependencies; use WANT_PGSQL as explained above
 #
 
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 VALID_PGSQL_VER=	9.0 9.1 9.2 9.3 9.4 9.5
 
 # Override non-default LIBVERS like this:

Mk/Uses/python.mk

@@ -220,6 +220,8 @@
 _INCLUDE_USES_PYTHON_MK=	yes
 
 # What Python version and what Python interpreters are currently supported?
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 _PYTHON_VERSIONS=		2.7 3.4 3.5 3.3	# preferred first
 _PYTHON_PORTBRANCH=		2.7		# ${_PYTHON_VERSIONS:[1]}
 _PYTHON_BASECMD=		${LOCALBASE}/bin/python

Mk/Uses/tcl.mk

@@ -67,6 +67,8 @@ _INCLUDE_USES_TCL_MK=	yes
 #
 # List the currently available versions.
 #
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 _TCLTK_VALID_VERSIONS=	84 85 86
 
 #

Mk/bsd.apache.mk

@@ -92,6 +92,8 @@ WARNING+=	"DEFAULT_APACHE_VER is defined, consider using DEFAULT_VERSIONS+=apach
 .endif
 
 DEFAULT_APACHE_VERSION?=	${APACHE_DEFAULT:S/.//}
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 APACHE_SUPPORTED_VERSION=	24 22 # preferred version first
 
 # Print warnings

Mk/bsd.database.mk

@@ -100,6 +100,8 @@ WARNING+=	"DEFAULT_MYSQL_VER is defined, consider using DEFAULT_VERSIONS=mysql=$
 .if defined(USE_MYSQL)
 DEFAULT_MYSQL_VER?=	${MYSQL_DEFAULT:S/.//}
 # MySQL client version currently supported.
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 MYSQL51_LIBVER=		16
 MYSQL55_LIBVER=		18
 MYSQL55m_LIBVER=	18

Mk/bsd.default-versions.mk

@@ -18,13 +18,21 @@ _l=		${lang:C/=.*//g}
 ${_l:tu}_DEFAULT=	${lang:C/.*=//g}
 .endfor
 
+# Possible values: 2.2, 2.4
 APACHE_DEFAULT?=	2.4
+# Possible values: 2.5
 FIREBIRD_DEFAULT?=	2.5
+# Possible values: 3.0.0
 FPC_DEFAULT?=		3.0.0
+# Possible values: 4.6, 4.7, 4.8, 4.9, 5
 GCC_DEFAULT?=		4.8
+# Possible values: 7, 8, 9, agpl
 GHOSTSCRIPT_DEFAULT?=	agpl
+# Possible values: 5.1, 5.2, 5.3
 LUA_DEFAULT?=		5.2
+# Possible values: 5.1, 5.5, 5.6, 5.7, 5.5m, 10.0m, 10.1m, 5.5p, 5.6p
 MYSQL_DEFAULT?=		5.6
+# Possible values: 5.18, 5.20, 5.22, devel
 .if !exists(${LOCALBASE}/bin/perl) || (!defined(_PORTS_ENV_CHECK) && \
     defined(PACKAGE_BUILDING))
 PERL5_DEFAULT?=		5.20
@@ -39,12 +47,19 @@ _PERL5_FROM_BIN!=	perl -e 'printf "%vd\n", $$^V;'
 _EXPORTED_VARS+=	_PERL5_FROM_BIN
 PERL5_DEFAULT:=		${_PERL5_FROM_BIN:R}
 .endif
+# Possible values: 9.0, 9.1, 9.2, 9.3, 9.4, 9.5
 PGSQL_DEFAULT?=		9.3
+# Possible values: 5.5, 5.6, 7.0
 PHP_DEFAULT?=		5.6
+# Possible values: 2.7, 3.3, 3.4, 3.5
 PYTHON_DEFAULT?=	2.7
+# Possible values: 2.7
 PYTHON2_DEFAULT?=	2.7
+# Possible values: 3.3, 3.4, 3.5
 PYTHON3_DEFAULT?=	3.4
+# Possible values: 2.0, 2.1, 2.2, 2.3
 RUBY_DEFAULT?=		2.2
+# Possible values: 8.4, 8.5, 8.6
 TCLTK_DEFAULT?=		8.6
 
 # Version of lang/gcc.  Do not override!

Mk/bsd.fpc.mk

@@ -40,6 +40,8 @@ FPC_Include_MAINTAINER=	freebsd-fpc@FreeBSD.org
 FPC_Pre_Include=	bsd.fpc.mk
 
 DEFAULT_FPC_VER=	${FPC_DEFAULT}
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 FPC_VER=		${DEFAULT_FPC_VER}
 FPC_ARCH=		${ARCH:S/amd64/x86_64/}
 

Mk/bsd.gcc.mk

@@ -35,6 +35,8 @@ GCC_Include_MAINTAINER=		gerald@FreeBSD.org
 
 # All GCC versions supported by the ports framework.  Keep them in
 # ascending order and in sync with the table below. 
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 GCCVERSIONS=	040200 040600 040700 040800 040900 050000
 
 # The first field is the OSVERSION in which it disappeared from the base.

Mk/bsd.php.mk

@@ -55,6 +55,8 @@ PHP_EXT_DIR!=	${PHPBASE}/bin/php-config --extension-dir | ${SED} -ne 's,^${PHPBA
 .else
 DEFAULT_PHP_VER?=	${PHP_DEFAULT:S/.//}
 
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 PHP_VER?=	${DEFAULT_PHP_VER}
 .if ${PHP_VER} == 70
 PHP_EXT_DIR=   20151012

Mk/bsd.ruby.mk

@@ -167,6 +167,8 @@ _RUBY_VENDORDIR!=	${_RUBY_CONFIG} 'puts C["vendordir"]'
 RUBY?=			${LOCALBASE}/bin/${RUBY_NAME}
 
 .if defined(RUBY_VER)
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 . if ${RUBY_VER} == 2.0
 #
 # Ruby 2.0
@@ -207,6 +209,8 @@ RUBY_PORTEPOCH=		1
 RUBY_PATCHLEVEL=	0
 RUBY23=			""	# PLIST_SUB helpers
 
+# When adding a version, please keep the comment in
+# Mk/bsd.default-versions.mk in sync.
 . else
 #
 # Other versions