Clear password after use

src/freedombone-app-bdsmail

@@ -391,6 +391,7 @@ function install_bdsmail {
     bdsmail_configure_users
 
     $BDSMAIL_DIR/bin/newmail $MY_USERNAME /home/$MY_USERNAME/MailDir/i2p "$user_account_password"
+    user_account_password=
 
     APP_INSTALLED=1
 }