pash: Added comment about /dev/urandom

pash

@@ -12,6 +12,9 @@ pw_add() {
         #
         # The 'dd' command is then used to read only the desired
         # password length.
+        #
+        # Regarding usage of '/dev/urandom' instead of '/dev/random'.
+        # See: https://www.2uo.de/myths-about-urandom
         pass=$(LC_ALL=C tr -dc "${PASH_PATTERN:-_A-Z-a-z-0-9}" < /dev/urandom |
             dd ibs=1 obs=1 count="${PASH_LENGTH:-50}" 2>/dev/null)