new README

Signed-off-by: fbt <fbt@fleshless.org>

ufwd

@@ -13,7 +13,13 @@ cfg_scan_delay='30'
 msg() { printf '%s\n' "$*"; }
 err() { echo "$*" >&2; }
 
-usage() { echo "No help available."; }
+usage() {
+	printf 'Usage: ufwd [-hn] [-d workdir] -D [check delay]\n'
+	printf '   -h            # Show this message.\n'
+	printf '   -n            # Enable notifications with notify-send. Must be installed.\n'
+	printf '   -d [path]     # Set the dir that is to be watched.\n'
+	printf '   -D [sec]      # Set the check interval.\n'
+}
 
 main() {
 	while (( $# )); do