Description: Allow override of test config by environment variables
 The get_config sub in t/testlib.pl has been modified so that an environment
 variable named MEMCACHED_param will override the parameter param in the config
 file t/CONFIG. This is useful, for example, when the port number is determined
 on the fly during automated testing. 
Author: Christopher Hoskin <christopher.hoskin@gmail.com>
Forwarded: https://rt.cpan.org/Public/Bug/Display.html?id=102008
Last-Update: 2015-02-08

--- a/t/testlib.pl
+++ b/t/testlib.pl
@@ -12,8 +12,11 @@
 
 sub get_config {
  	my ($config, $param) = @_;
-	if ($config =~ /^$param\s*?=\s*(.*?)$/m) {
-   	return $1;
+	if (exists $ENV{"MEMCACHED_$param"}) {
+		return $ENV{"MEMCACHED_$param"};
+	} 
+	elsif ($config =~ /^$param\s*?=\s*(.*?)$/m) {
+   		return $1;
 	}
 	return '';
 }