Added msgset.y

 AUTOMAKE_OPTIONS = ../lib/ansi2knr no-dependencies
-
+if MAINTAINER_MODE
+AM_YFLAGS=-vt
+endif
 INCLUDES = -I${top_srcdir}/include -I${top_srcdir}/lib @ARGPINCS@
 AM_CFLAGS = -DSITE_MAIL_RC=\"@SITE_MAIL_RC@\"
 
@@ -10,7 +12,7 @@ mail_LDADD = @ARGPLIBS@ ../mailbox/libmailbox.la ../lib/libmailutils.a \
 
 mail_SOURCES = alias.c alt.c cd.c copy.c delete.c dp.c echo.c \
   edit.c eq.c exit.c file.c folders.c followup.c from.c headers.c help.c \
-  hold.c if.c inc.c list.c mail.c mail.h mailline.c mbox.c next.c pipe.c \
-  previous.c print.c quit.c reply.c retain.c save.c send.c set.c shell.c \
-  size.c source.c summary.c table.c top.c touch.c unalias.c undelete.c \
-  unset.c util.c var.c version.c visual.c write.c z.c decode.c
+  hold.c if.c inc.c list.c mail.c mail.h mailline.c mbox.c msgset.y next.c \
+  pipe.c previous.c print.c quit.c reply.c retain.c save.c send.c set.c \
+  shell.c size.c source.c summary.c table.c top.c touch.c unalias.c \
+  undelete.c unset.c util.c var.c version.c visual.c write.c z.c decode.c