poppler: improved to enable libcurl based http support if curl is effectively installed

graphic/poppler/poppler.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../poppler/poppler.conf
-# Copyright (C) 2006 - 2010 The OpenSDE Project
+# Copyright (C) 2006 - 2013 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -16,6 +16,9 @@
 # zlib support
 pkginstalled zlib && var_append confopt " " "--enable-zlib"
 
+# libcurl based HTTP support
+pkginstalled -f curl && var_append confopt " " "--enable-libcurl"
+
 var_append confopt ' ' "--enable-opi"
 var_append confopt ' ' "--enable-a4-paper"    # WARNING should be config opt.