Add a "fork" of musl as //fusl.

fusl/arch/mips/bits/socket.h

+struct msghdr
+{
+        void *msg_name;
+        socklen_t msg_namelen;
+        struct iovec *msg_iov;
+        int msg_iovlen;
+        void *msg_control;
+        socklen_t msg_controllen;
+        int msg_flags;
+};
+
+struct cmsghdr
+{
+        socklen_t cmsg_len;
+        int cmsg_level;
+        int cmsg_type;
+};
+
+#define SOCK_STREAM    2
+#define SOCK_DGRAM     1
+
+#define SOL_SOCKET     65535
+
+#define SO_DEBUG        1
+
+#define SO_REUSEADDR    0x0004
+#define SO_KEEPALIVE    0x0008
+#define SO_DONTROUTE    0x0010
+#define SO_BROADCAST    0x0020
+#define SO_LINGER       0x0080
+#define SO_OOBINLINE    0x0100
+#define SO_REUSEPORT    0x0200
+#define SO_SNDBUF       0x1001
+#define SO_RCVBUF       0x1002
+#define SO_SNDLOWAT     0x1003
+#define SO_RCVLOWAT     0x1004
+#define SO_RCVTIMEO     0x1006
+#define SO_SNDTIMEO     0x1005
+#define SO_ERROR        0x1007
+#define SO_TYPE         0x1008
+#define SO_ACCEPTCONN   0x1009
+#define SO_PROTOCOL     0x1028
+#define SO_DOMAIN       0x1029
+
+#define SO_NO_CHECK     11
+#define SO_PRIORITY     12
+#define SO_BSDCOMPAT    14
+#define SO_PASSCRED     17
+#define SO_PEERCRED     18
+#define SO_SNDBUFFORCE  31
+#define SO_RCVBUFFORCE  33
+
+#define SOCK_NONBLOCK     0200
+#define SOCK_CLOEXEC  02000000