Always clear the rcsbuf cache before exiting.
This is required for when CVS is used as a DLL, as otherwise the RCS file
will remain open, causing later modifications to the file to mysteriously
fail.  This is also a descriptor leak, and some OSs may not like it very
much...

diff -r -u cvs-1.10.8-cvsnt/src/main.c cvs-1.10.8-New/src/main.c
--- cvs-1.10.8-cvsnt/src/main.c	Mon Apr 02 08:49:29 2001
+++ cvs-1.10.8-New/src/main.c	Tue Mar 20 09:28:46 2001
@@ -1100,7 +1100,8 @@
        NT and OS2 or dealing with windows and arguments on Mac.  */
     SYSTEM_CLEANUP ();
 #endif
 
+    rcsbuf_cache_close ();
+
     /* This is exit rather than return because apparently that keeps
        some tools which check for memory leaks happier.  */
     exit (err ? EXIT_FAILURE : 0);
diff -r -u cvs-1.10.8-cvsnt/src/rcs.c cvs-1.10.8-New/src/rcs.c
--- cvs-1.10.8-cvsnt/src/rcs.c	Mon Apr 02 08:49:29 2001
+++ cvs-1.10.8-New/src/rcs.c	Tue Mar 20 08:58:30 2001
@@ -70,7 +70,6 @@
 static void rcsbuf_get_buffered PROTO ((struct rcsbuffer *, char **datap,
 					size_t *lenp));
 static void rcsbuf_cache PROTO ((RCSNode *, struct rcsbuffer *));
-static void rcsbuf_cache_close PROTO ((void));
 static void rcsbuf_cache_open PROTO ((RCSNode *, long, FILE **,
 				      struct rcsbuffer *));
 static int checkmagic_proc PROTO((Node *p, void *closure));
@@ -2235,7 +2235,7 @@
 
 /* If there is anything in the cache, close it.  */
 
-static void
+void
 rcsbuf_cache_close ()
 {
     if (cached_rcs != NULL)
diff -r -u cvs-1.10.8-cvsnt/src/rcs.h cvs-1.10.8-New/src/rcs.h
--- cvs-1.10.8-cvsnt/src/rcs.h	Fri Jan 29 20:25:34 1999
+++ cvs-1.10.8-New/src/rcs.h	Tue Mar 20 08:58:28 2001
@@ -232,6 +232,8 @@
 			    size_t, char **, size_t *));
 char *make_file_label PROTO ((char *, char *, RCSNode *));
 
+void rcsbuf_cache_close PROTO ((void));
+
 extern int preserve_perms;
 
 /* From import.c.  */