Merge "pjproject_bundled: Allow IPv4/IPv6 (Dual Stack) configurations." into 14

third-party/pjproject/patches/0003-r5403-pjsip_IPV6_V6ONLY.patch

@@ -0,0 +1,13 @@
+--- a/pjlib/src/pj/sock_bsd.c
++++ b/pjlib/src/pj/sock_bsd.c
+@@ -539,6 +539,10 @@
+ 	    pj_sock_setsockopt(*sock, pj_SOL_SOCKET(), pj_SO_NOSIGPIPE(),
+ 			       &val, sizeof(val));
+ 	}
++	if (af != PJ_AF_INET) { /* Linux Kernel 2.4.21; June 2003 */
++	    pj_sock_setsockopt(*sock, PJ_SOL_IPV6, IPV6_V6ONLY,
++			       &val, sizeof(val));
++	}
+ #if defined(PJ_IPHONE_OS_HAS_MULTITASKING_SUPPORT) && \
+     PJ_IPHONE_OS_HAS_MULTITASKING_SUPPORT!=0
+ 	if (type == pj_SOCK_DGRAM()) {