fix an issue

src/main/jni/badvpn/tun2socks/tun2socks.c

@@ -502,9 +502,11 @@ int main (int argc, char **argv)
         goto fail2;
     }
 
+    char *path = "/data/data/com.github.shadowsocks/sock_path";
+    unlink(path);
     memset(&addr, 0, sizeof(addr));
     addr.sun_family = AF_UNIX;
-    strncpy(addr.sun_path, "/data/data/com.github.shadowsocks/sock_path", sizeof(addr.sun_path)-1);
+    strncpy(addr.sun_path, path, sizeof(addr.sun_path)-1);
 
     if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
         BLog(BLOG_ERROR, "bind() failed: %s (sock = %d)\n", strerror(errno), sock);

src/main/scala/com/github/shadowsocks/ShadowsocksVpnService.scala

@@ -336,7 +336,7 @@ class ShadowsocksVpnService extends VpnService with BaseService {
 
     if (BuildConfig.DEBUG) Log.d(TAG, cmd)
 
-    Console.runCommand(cmd.mkString(" "))
+    Console.runCommand(cmd)
 
     return fd;
   }