Adds the creator to PostScript files generated by tr2post.
When/if the PostScript program is distilled into a PDF file,
anyone who cares to look up the application in Adobe
Acrobat Reader (or whatever) will see that Plan 9 was
involved in the files creation! (not to mention troff)
--btdn

Reference: /n/sources/patch/applied/tr2post-creator
Date: Fri Dec  1 00:32:15 CET 2006

--- /sys/src/cmd/postscript/tr2post/tr2post.c	Sun Nov 26 00:32:47 2006
+++ /sys/src/cmd/postscript/tr2post/tr2post.c	Sun Nov 26 00:32:45 2006
@@ -37,6 +37,7 @@
 
 	Bprint(Bstdout, "%s", CONFORMING);
 	Bprint(Bstdout, "%s %s\n", VERSION, PROGRAMVERSION);
+	Bprint(Bstdout, "%s %s\n", CREATOR, PROGRAMNAME);
 	Bprint(Bstdout, "%s %s\n", DOCUMENTFONTS, ATEND);
 	Bprint(Bstdout, "%s %s\n", PAGES, ATEND);
 	Bprint(Bstdout, "%s", ENDCOMMENTS);
--- /sys/src/cmd/postscript/tr2post/mkfile	Sun Nov 26 00:32:55 2006
+++ /sys/src/cmd/postscript/tr2post/mkfile	Sun Nov 26 00:32:54 2006
@@ -29,7 +29,7 @@
 
 </sys/src/cmd/mkone
 
-CFLAGS=-c -D'PROGRAMVERSION="0.1"' -D'DOROUND=1' -I$COMMONDIR
+CFLAGS=-c -D'PROGRAMVERSION="0.1"' -D'DOROUND=1' -I$COMMONDIR -D'PROGRAMNAME="troff, Plan 9 edition"'
 
 %.$O:	$COMMONDIR/%.c
 	$CC $CFLAGS $COMMONDIR/$stem.c