Include netinet/in.h explicitly for struct sockaddr_in (#333)

* Include netinet/in.h for struct sockaddr_in on FreeBSD

* Add news item

Author: shikokuchuo

NEWS.md

@@ -3,6 +3,7 @@
 #### Updates
 
 * `race_aio()` is more efficient, and no longer resets the supplied condition variable or consumes its signals.
+* Fixes compilation on FreeBSD (#332).
 
 # nanonext 1.10.1
 

src/nanonext.h

@@ -60,6 +60,7 @@ typedef struct nano_handle_s {
 #include <ifaddrs.h>
 #include <arpa/inet.h>
 #include <net/if.h>
+#include <netinet/in.h>
 #endif
 #endif