Use SO_REUSEPORT only for AF_INET sockets (#303)

The latest python version changes the behavior, now if it's used with
other kind of sockets (ex AF_UNIX) it raises OSError:

python/cpython#128916

thriftpy2/contrib/aio/socket.py

@@ -281,7 +281,9 @@ def _init_sock(self):
             _sock = socket.socket(self.socket_family, socket.SOCK_STREAM)
 
         _sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        if hasattr(socket, "SO_REUSEPORT"):
+        # valid socket https://github.com/python/cpython/issues/128916
+        valid_family = (socket.AF_INET, socket.AF_INET6)
+        if _sock.family in valid_family and hasattr(socket, "SO_REUSEPORT"):
             try:
                 _sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
             except socket.error as err:

thriftpy2/transport/socket.py

@@ -201,7 +201,9 @@ def _init_sock(self):
             _sock = socket.socket(self.socket_family, socket.SOCK_STREAM)
 
         _sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        if hasattr(socket, "SO_REUSEPORT"):
+        # valid socket https://github.com/python/cpython/issues/128916
+        valid_family = (socket.AF_INET, socket.AF_INET6)
+        if _sock.family in valid_family and hasattr(socket, "SO_REUSEPORT"):
             try:
                 _sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
             except socket.error as err: