groff 1.18 in Linux.bsd.man.mk

[norc1212 <norc1212%gmail.com@localhost>]

Hello

may I ask committers to add the following change?

--- pkgsrc/pkgtools/bootstrap-mk-files/files/mods/Linux.bsd.man.mk.orig 
2011-01-18 04:57:23.000000000 +0100
+++ pkgsrc/pkgtools/bootstrap-mk-files/files/mods/Linux.bsd.man.mk 
2011-10-19 17:53:40.000000000 +0200
@@ -32,6 +32,8 @@
 TMACDIR?=      ${DESTDIR}/usr/share/groff/1.18.1.4/tmac
 .elif exists(${DESTDIR}/usr/share/groff/1.18.1/tmac)
 TMACDIR?=      ${DESTDIR}/usr/share/groff/1.18.1/tmac
+.elif exists(${DESTDIR}/usr/share/groff/1.18/tmac)
+TMACDIR?=      ${DESTDIR}/usr/share/groff/1.18/tmac
 .elif exists(${DESTDIR}/usr/share/groff/1.17.2/tmac)
 TMACDIR?=      ${DESTDIR}/usr/share/groff/1.17.2/tmac
 .else

It's needed on RedHat 8 (Psyche). Yes, quite ancient, I know.
Still on some machines I must operate.

Thanks in advance
norc