devel/gnustep-make: Fix and modernize pkg-plist

Running "make check-plist" on gnustep-make results in plist errors:

===> Checking for items in STAGEDIR missing from pkg-plist
  Orphaned: GNUstep/System/Library/Makefiles/Master/deb.make
  Orphaned: GNUstep/System/Library/Makefiles/deb-equivs-control.template
  Orphaned: GNUstep/System/Makefiles

The latest was caused by a keyword typo (I think) and the first two were
just missing.  While here, modernize the whole thing.  No @exec keywords
are needed -- the post-install takes care of the symlink already.
Fix some leftovers in most xpi-* ports after r370932
Update to upstream version 6.4.2
Maintainer change from ports@ to Anton Törnqvist (antont@inbox.lv)

PR:		194704
Submitted by:	antont@inbox.lv (new maintainer)
Revive www/rejik

Change maintainer from ports@ to Roman (roma.a.g@gmail.com)

PR:		194837
Submitted by:	roma.a.g@gmail.com (maintainer)
Update to signing-party 1.1.11
Add revived port www/rejik to www/Makefile