PID changes, knotc start removed, AF_UNIX socket support, doc

You changed the default control port from 5553 to 5533, but knot.full.conf and documentation (texi) still refers to old port number.

I really like the simplification of PID file handling and communication of knotc with knotd.

What about removing port number from following message when AF_UNIX sockets are used for control:

Binding remote control interface to /var/run/knot/knot.sock@0.

Binding to AF_UNIX socket does not work on my Linux machine - Cannot bind to socket (errno 22). EINVAL?

• Updated control port references in knot.full.conf and manpage, didn't find it in texi files though
• Port isn't printed for AF_UNIX sockets, reused a buffer for commands for formatting
• Not working AF_UNIX now fixed. I must have been very tired, although it is odd that FreeBSD didn't mind...

# These lines should be obviously switched
uaddr.sun_family = AF_UNIX;
memset(&uaddr, 0, sizeof(struct sockaddr_un));

Could you recheck please? :goberserk:

Looks fine now!