add docu about ssl peers

Changes

@@ -6,6 +6,9 @@ Revision history for Dancer-Plugin-Auth-Twitter
     * Replace default engine to be Net::Twitter::Lite.
         (GH#15, odyniec)
 
+    [ DOCUMENTATION ]
+    * Add note about 'can't verify ssl peer'. (GH#16)
+
     [ MISC ]
     * Add tests. (GH#17, odyniec)
 

lib/Dancer/Plugin/Auth/Twitter.pm

@@ -290,6 +290,16 @@ specified by C<callback_success>.
 If the validation of the token returned by Twitter failed or was denied,
 the user will be redirect to the URI specified by C<callback_fail>.
 
+=head1 TIPS AND TRICKS
+
+If you get the error
+
+    Net::Twitter::Role::OAuth::get_authorization_url(): 
+        GET https://api.twitter.com/oauth/request_token failed: 500 
+        Can't verify SSL peers without knowing which Certificate Authorities to trust
+
+you can silence it by setting the environment variable C<PERL_LWP_SSL_VERIFY_HOSTNAME> to C<0>.
+
 =head1 ACKNOWLEDGEMENTS
 
 This plugin has been written as a port of