[master] 6550d4b Substitute NET_LIBS, for SunOS platforms

[Dridi Boukelmoune]

commit 6550d4b358febb32e2ee13d65358d42ad0b8f51f
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Sat Nov 26 15:05:36 2016 +0100

    Substitute NET_LIBS, for SunOS platforms
    
    Spotted by VTEST

diff --git a/configure.ac b/configure.ac
index 4ad52ec..33881a3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -70,7 +70,8 @@ _VARNISH_CHECK_LIB(rt, clock_gettime)
 _VARNISH_CHECK_LIB(dl, dlopen)
 _VARNISH_CHECK_LIB(socket, socket)
 _VARNISH_CHECK_LIB(nsl, getaddrinfo)
-NET_LIBS="${SOCKET_LIBS} ${NSL_LIBS}"
+
+AC_SUBST(NET_LIBS, "${SOCKET_LIBS} ${NSL_LIBS}")
 
 AX_WITH_CURSES
 if test "x$ax_cv_curses" != xyes; then