separate module, which just declares a configuration value that
causes the xinetd module to add it to xinetd.conf. Also Nixified
the service declarations to abstract over the inetd implementation.
* Renamed the services.xinetd.tftpd options to services.tftpd. The
fact that the tftpd module uses xinetd is an implementation detail.
* xinetd: use -dontfork to let Upstart monitor it, and use -syslog to
get error messages at startup.
svn path=/nixos/trunk/; revision=16803
