Fix a cvs server bug introduced in 1.11.2, in the words of the author:

---
Fix communication hanging in communication shutdown phase, caused by at
least older CVS clients (version < 1.11.2) and a semantically incorrect
usage of getc() by the server.
---

getc() was being used on a blocking socket/pipe.

Submitted by:   rse

contrib/cvs/src/buffer.c

@@ -1,5 +1,7 @@
 /* Code for the buffer data structure.  */
 
+/* $FreeBSD$ */
+
 #include <assert.h>
 #include "cvs.h"
 #include "buffer.h"
@@ -1378,8 +1380,7 @@ stdio_buffer_shutdown (buf)
 
     if (buf->input)
     {
-	if (! buf_empty_p (buf)
-	    || getc (bc->fp) != EOF)
+	if (! buf_empty_p (buf))
 	{
 # ifdef SERVER_SUPPORT
 	    if (server_active)