Return-Receipt-To: processing

[Eugene Crosser <crosser@online.ru>]

mailbox.c need to be patched to produce valid Return-Receipt-To report
when there is no form in the forms directory:

--- transports/mailbox/mailbox.c.orig	Thu Nov 21 22:49:10 1996
+++ transports/mailbox/mailbox.c	Thu Dec  5 18:14:08 1996
@@ -2601,7 +2601,7 @@
 	  fclose(efp);
 	} else {
 	  for (cpp = &dfltform[0]; *cpp != NULL; ++cpp)
-	    if (*cpp == 0) {
+	    if (*cpp[0] == 0) {
 	      fprintf(mfp, "\tboundary=\"%s\"\n\n\n",boundarystr);
 	      fprintf(mfp, "--%s\n", boundarystr);
 	      fprintf(mfp, "Content-Type: text/plain\n");