check for sys/mman.h and mmap (used by parse_reply-test)

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11358 ec53bebd-3082-4978-b11e-865c3cabbd6b

cf/roken-frag.m4

@@ -69,6 +69,7 @@ AC_CHECK_HEADERS([\
 	shadow.h				\
 	sys/bswap.h				\
 	sys/ioctl.h				\
+	sys/mman.h				\
 	sys/param.h				\
 	sys/proc.h				\
 	sys/resource.h				\
@@ -205,6 +206,8 @@ fi
 
 AC_REQUIRE([AC_FUNC_GETLOGIN])
 
+AC_REQUIRE([AC_FUNC_MMAP])
+
 AC_FIND_FUNC_NO_LIBS(getsockopt,,
 [#ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>