sk: Move unix socket code to separate file

Funny, but after this git thinks, that I've renamed the sockets.c
file into sk-unix.c one and fixed it a little bit %)
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Makefile

@@ -40,6 +40,7 @@ OBJS		+= log.o
 OBJS		+= libnetlink.o
 OBJS		+= sockets.o
 OBJS		+= sk-inet.o
+OBJS		+= sk-unix.o
 OBJS		+= sk-queue.o
 OBJS		+= files.o
 OBJS		+= pipes.o

include/sockets.h

@@ -36,9 +36,13 @@ struct socket_desc {
 	int			already_dumped;
 };
 
+struct socket_desc *lookup_socket(int ino);
 int sk_collect_one(int ino, int family, struct socket_desc *d);
 int dump_one_inet(struct socket_desc *_sk, struct fd_parms *p,
 			 const struct cr_fdset *cr_fdset);
+int dump_one_unix(const struct socket_desc *_sk, struct fd_parms *p,
+		int lfd, const struct cr_fdset *cr_fdset);
 struct nlmsghdr;
 int inet_collect_one(struct nlmsghdr *h, int family, int type, int proto);
+int unix_receive_one(struct nlmsghdr *h);
 #endif /* CR_SOCKETS_H__ */