pkgbase: Add an src.conf option for splitting man pages

Man pages can be big in total, add an options to split man pages
in -man packages so we produce smaller packages.
This is useful for small jails or mfsroot produced of pkgbase.
The option is off by default.

Reviewed by:	bapt, Mina Galić <me@igalic.co>
Differential Revision:	https://reviews.freebsd.org/D29169
MFC after:      2 weeks

(cherry picked from commit c7e6cb9e08)

release/packages/generate-ucl.sh

@@ -71,6 +71,11 @@ main() {
 			_descr="Debugging Symbols"
 			pkgdeps="${outname}"
 			;;
+		*_man)
+			outname="${outname%%_man}"
+			_descr="Manual Pages"
+			pkgdeps="${outname}"
+			;;
 		${origname})
 			pkgdeps="runtime"
 			;;

share/man/man5/src.conf.5

@@ -1099,6 +1099,8 @@ is set explicitly)
 .It Va WITHOUT_MANCOMPRESS
 Set to not to install compressed man pages.
 Only the uncompressed versions will be installed.
+.It Va WITH_MANSPLITPKG
+Set to split man pages into their own packages during make package.
 .It Va WITHOUT_MAN_UTILS
 Set to not build utilities for manual pages,
 .Xr apropos 1 ,

share/mk/bsd.man.mk

@@ -50,7 +50,11 @@
 .error bsd.man.mk cannot be included directly.
 .endif
 
+.if ${MK_MANSPLITPKG} == "no"
 MINSTALL?=	${INSTALL} ${TAG_ARGS} -o ${MANOWN} -g ${MANGRP} -m ${MANMODE}
+.else
+MINSTALL?=	${INSTALL} ${TAG_ARGS:D${TAG_ARGS},man} -o ${MANOWN} -g ${MANGRP} -m ${MANMODE}
+.endif
 
 CATDIR=		${MANDIR:H:S/$/\/cat/}
 CATEXT=		.cat
@@ -226,8 +230,13 @@ maninstall: ${MAN}
 .endif	# ${MK_MANCOMPRESS} == "no"
 .endif
 .for l t in ${_MANLINKS}
+.if ${MK_MANSPLITPKG} == "no"
 	rm -f ${DESTDIR}${t} ${DESTDIR}${t}${MCOMPRESS_EXT}; \
 	    ${INSTALL_MANLINK} ${TAG_ARGS} ${DESTDIR}${l}${ZEXT} ${DESTDIR}${t}${ZEXT}
+.else
+	rm -f ${DESTDIR}${t} ${DESTDIR}${t}${MCOMPRESS_EXT}; \
+	    ${INSTALL_MANLINK} ${TAG_ARGS:D${TAG_ARGS},man} ${DESTDIR}${l}${ZEXT} ${DESTDIR}${t}${ZEXT}
+.endif
 .endfor
 
 manlint:

share/mk/src.opts.mk

@@ -208,6 +208,7 @@ __DEFAULT_NO_OPTIONS = \
     LOADER_FIREWIRE \
     LOADER_VERBOSE \
     LOADER_VERIEXEC_PASS_MANIFEST \
+    MANSPLITPKG \
     OFED_EXTRA \
     OPENLDAP \
     OPENSSL_KTLS \

tools/build/options/WITH_MANSPLITPKG

@@ -0,0 +1,2 @@
+.\" $FreeBSD$
+Set to split man pages into their own packages during make package.