curl-config now shows asyncdns if built with ares enabled

CHANGES

@@ -7,6 +7,11 @@
                                   Changelog
 
 
+Daniel (8 December)
+- Based on a patch from Dominick Meglio, curl-config --feature now outputs
+  'AsynchDNS' as a feature if libcurl was built with ares. The feature name
+  is the same that 'curl -V' outputs, for simplicity.
+
 Daniel (3 December)
 - Marty Kuhrt made the build up-to-date on VMS, and moved most of the VMS-
   specific stuff in the client code to a separate header file.

configure.ac

@@ -1043,7 +1043,9 @@ AC_HELP_STRING([--disable-ares],[Disable using ares for name lookups]),
        fi
 
        AC_DEFINE(USE_ARES, 1, [Define if you want to enable ares support])
-
+       dnl substitute HAVE_ARES for curl-config and similar
+       HAVE_ARES="1"
+       AC_SUBST(HAVE_ARES)
        ares="yes"
        ;;
   esac ],

curl-config.in

@@ -90,6 +90,9 @@ while test $# -gt 0; do
 	if test "@CURL_DISABLE_DICT@" = "1"; then
           echo "DICT-disabled"
         fi
+	if test "@HAVE_ARES@" = "1"; then
+          echo "AsynchDNS"
+        fi
 	;;
 
     --version)