Revert "man_pages_posix: bump to 2017.a (#10641)" (#10656)

This reverts commit 00980a3fb6.

sys-apps/man-pages-posix/man_pages_posix-2017.a.recipe

@@ -1,51 +0,0 @@
-SUMMARY="POSIX man-pages (0p, 1p, 3p)"
-DESCRIPTION="Contains descriptions of the headers, the utilities, \
-and the functions documented in the POSIX standard."
-HOMEPAGE="https://www.kernel.org/doc/man-pages/"
-COPYRIGHT="2017 Institute of Electrical and Electronics Engineers, Inc
-	2017 The Open Group"
-LICENSE="POSIX"
-REVISION="1"
-SOURCE_URI="https://www.kernel.org/pub/linux/docs/man-pages/man-pages-posix/${portName//_/-}-${portVersion/./-}.tar.xz"
-CHECKSUM_SHA256="ce67bb25b5048b20dad772e405a83f4bc70faf051afa289361c81f9660318bc3"
-SOURCE_DIR="${portName//_/-}-${portVersion%.*}"
-
-ARCHITECTURES="any"
-DISABLE_SOURCE_PACKAGE="yes"
-
-PROVIDES="
-	$portName = $portVersion
-	"
-REQUIRES=""
-
-BUILD_REQUIRES=""
-BUILD_PREREQUIRES="
-	cmd:find
-	cmd:make
-	cmd:perl
-	"
-
-PATCH()
-{
-	# Replace Linux's prolog with Haiku's
-	local prolog="This manual page is part of the POSIX Programmer's Manual.\\n\
-This interface might not be implemented on Haiku."
-
-	local manpages=( $(find man?p -type f) )
-	for m in "${manpages[@]}"
-	do
-		perl -e '
-while (<>) {
-	$s .= $_;
-}
-chomp $s;
-$s =~ s/(?<=\.SH PROLOG\n).*?(?=^\s*$)/'"$prolog"'/gms;
-print "$s"
-' < "$m" > "$m.new"
-		mv "$m.new" "$m"
-	done
-}
-
-INSTALL() {
-	make MANDIR="$manDir" install
-}