profiles: blacklist sway IPC socket

[FelixPehla]

Much like the i3 IPC socket (#6361), the sway IPC socket also allows arbitrary code execution via the exec subcommand (i.e. swaymsg exec 'echo test > ~/test') . Access should only be permitted to sway itself by default.

The location of the IPC socket is set in sway/ipc-server.c:

	const char *dir = getenv("XDG_RUNTIME_DIR");
	if (!dir) {
		dir = "/tmp";
	}
	if (path_size <= snprintf(ipc_sockaddr->sun_path, path_size,
			"%s/sway-ipc.%u.%i.sock", dir, getuid(), getpid())) {
		sway_abort("Socket path won't fit into ipc_sockaddr->sun_path");
	}

[FelixPehla]

Realized that I used slightly different paths (${RUNUSER}/sway-ipc.* vs. ${RUNUSER}/sway-ipc.*.sock) in different files, should be consistent now.

[glitsj16]

Nice to have this in.

[kmk3]

Nicely done.