More ticket #415: more IPv6 and some reorganization of the source codes

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1601 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/include/pj/errno.h b/pjlib/include/pj/errno.h
index 507bd7b..b838f06 100644
--- a/pjlib/include/pj/errno.h
+++ b/pjlib/include/pj/errno.h
@@ -314,6 +314,11 @@
  * IPv6 is not supported
  */
 #define PJ_EIPV6NOTSUP	    (PJ_ERRNO_START_STATUS + 21)/* 70021 */
+/**
+ * @hideinitializer
+ * Unsupported address family
+ */
+#define PJ_EAFNOTSUP	    (PJ_ERRNO_START_STATUS + 22)/* 70022 */
 
 /** @} */   /* pj_errnum */