Properly define UA_fd_set and UA_fd_isset for OpenBSD.

plugins/ua_network_tcp.c

@@ -51,7 +51,7 @@
 #endif
 
 /* unsigned int for windows and workaround to a glibc bug */
-#if defined(_WIN32) || (defined(__GNU_LIBRARY__) && (__GNU_LIBRARY__ <= 6) && (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 16))
+#if defined(_WIN32) || defined(__OpenBSD__) || (defined(__GNU_LIBRARY__) && (__GNU_LIBRARY__ <= 6) && (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 16))
 # define UA_fd_set(fd, fds) FD_SET((unsigned int)fd, fds)
 # define UA_fd_isset(fd, fds) FD_ISSET((unsigned int)fd, fds)
 #else