update plp.cgi

Update plp.cgi intro comments to reflect new interfaces status.
To make it more usable out of the box, executable flag is set (so it can be
run directly) and uses interpreter from environment (/usr/bin/env should be
supported better than /usr/bin/perl).

diff --git a/plp.cgi b/plp.cgi
old mode 100644 (file)
new mode 100755 (executable)
index 0b64457..c4094d7
--- a/plp.cgi
+++ b/plp.cgi
@@ -1,7 +1,7 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
-# This script is not installed automatically, and is not needed for mod_perl
-# installations.
+# Executable to serve PLP scripts using CGI.
+# Not installed automatically, and only needed for CGI installations.
 
 use PLP::CGI;