Shorter password is easier to copy and paste

src/freedombone-app-fedwiki

     FEDWIKI_ONION_HOSTNAME=$(add_onion_service fedwiki 80 ${FEDWIKI_ONION_PORT})
 
     if [ ! $FEDWIKI_COOKIE ]; then
-        FEDWIKI_COOKIE="$(create_password 30)"
+        FEDWIKI_COOKIE="$(create_password 20)"
     fi
 
     echo '[Unit]' > /etc/systemd/system/fedwiki.service