File man-propose-online.patch of Package man

diff -ur man-db-2.10.2/src/man.c man-db-2.10.2.patch/src/man.c
--- man-db-2.10.2/src/man.c	2022-03-17 19:41:27.000000000 +0100
+++ man-db-2.10.2.patch/src/man.c	2023-04-03 17:13:05.944119389 +0200
@@ -774,11 +774,16 @@
 	}
 #endif
 
-	if (sec)
+	if (sec) {
 		fprintf (stderr, _("No manual entry for %s in section %s\n"),
 			 name, sec);
-	else
+		fprintf (stderr, _("Possibly, man page is not installed, try online at: "));
+		fprintf (stderr, _("https://manpages.opensuse.org/%s.%s\n"), name, sec);
+	} else    {
 		fprintf (stderr, _("No manual entry for %s\n"), name);
+		fprintf (stderr, _("Possibly, man page is not installed, try online at: "));
+		fprintf (stderr, _("https://manpages.opensuse.org/%s\n"), name);
+	}
 
 #ifdef UNDOC_COMMAND
 	if (getenv ("MAN_TEST_DISABLE_UNDOCUMENTED") == NULL &&
diff -ur man-db-2.10.2/src/tests/man-invalid-db-entry man-db-2.10.2.patch/src/tests/man-invalid-db-entry
--- man-db-2.10.2/src/tests/man-invalid-db-entry	2022-03-17 19:41:27.000000000 +0100
+++ man-db-2.10.2.patch/src/tests/man-invalid-db-entry	2023-04-03 17:13:55.256508193 +0200
@@ -25,6 +25,8 @@
 rm -f "$tmpdir/usr/share/man/man1/test.1"
 
 echo "No manual entry for test" > "$tmpdir/1.exp"
+echo "Possibly, man page is not installed, try online at: https://manpages.opensuse.org/test" >> "$tmpdir/1.exp"
+
 LC_ALL=C run $MAN -C "$tmpdir/manpath.config" test 2> "$tmpdir/1.out"
 expect_files_equal 'invalid DB entry' "$tmpdir/1.exp" "$tmpdir/1.out"