scripts: add bcrypt script

scripts/bcrypt

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -euo pipefail
+
+if [ "$#" = 0 ]; then
+    echo "Usage: $0 [passwords...] | $0 - < passwords.txt" >&2
+    exit 1
+fi
+
+if [ "$1" = '-' ]; then
+    xargs -x -n1 -d'\n' htpasswd -bnBC 10 "" | tr -d ':' | sed '/^$/d'
+else
+    for pass in "$@"; do
+        htpasswd -bnBC 10 "" "$pass" | tr -d ':' | sed '/^$/d'
+    done
+fi
+