0.2.1.1: Fixed Privilege Dropping

• Server
  • Make user parameter in config optional. If it is not given or set to null, spacecookie won't attempt to change its UID and GID. This is especially useful, if socket activation is used. In that case it is not necessary to start spacecookie as root since systemd sets up the socket, so spacecookie can be already started by the right user and doesn't need to change UID.
  • Example Systemd config files
    • SocketMode is now 660 instead of default 666.
    • Set User and Group for spacecookie.service as well.
    • Set "user": null in spacecookie.json
• Library
  • Fixed issue that led to runGopher* trying to change UID even if it wasn't possible (not running as root). This especially affected the spacecookie server, since cRunUserName would always be Just.
  • Made logging related to dropPrivileges clearer.