Replace LC_CTYPE with LC_ALL (#1474)

Additionally allows generating a password on current gen Macbook.

Before:
LC_CTYPE=C tr -c -d '0123456789abcdefghijklmnopqrstuvwxyz' </dev/urandom | dd bs=32 count=1 2>/dev/null;echo
tr: Illegal byte sequence

After:
LC_ALL=C tr -c -d '0123456789abcdefghijklmnopqrstuvwxyz' </dev/urandom | dd bs=32 count=1 2>/dev/null;echo
nhq2bu42k0iox5svm9rnmmon3oc2i55g

config-templates/config.php

@@ -129,7 +129,7 @@ $config = [
      * 'secretsalt' can be any valid string of any length.
      *
      * A possible way to generate a random salt is by running the following command from a unix shell:
-     * LC_CTYPE=C tr -c -d '0123456789abcdefghijklmnopqrstuvwxyz' </dev/urandom | dd bs=32 count=1 2>/dev/null;echo
+     * LC_ALL=C tr -c -d '0123456789abcdefghijklmnopqrstuvwxyz' </dev/urandom | dd bs=32 count=1 2>/dev/null;echo
      */
     'secretsalt' => 'defaultsecretsalt',