LCR now runs as a user.

LCR now runs as a user.
You may change the path of socket and lock files.
LCR admin socket's flags can now be altered to allow access to other users.
Lock and socket files will now be removed when terminating LCR.

	modified:   Makefile
	modified:   chan_lcr.c
	modified:   default/options.conf
	modified:   lcradmin.c
	modified:   lcrsocket.h
	modified:   main.c
	modified:   options.c
	modified:   options.h
	modified:   socket_server.c