fixes #6674 detect pk_cpn as URL parameter for campaign name

config/global.ini.php

@@ -571,13 +571,13 @@ ignore_visits_cookie_name = piwik_ignore
 ; Comma separated list of variable names that will be read to define a Campaign name, for example CPC campaign
 ; Example: If a visitor first visits 'index.php?piwik_campaign=Adwords-CPC' then it will be counted as a campaign referrer named 'Adwords-CPC'
 ; Includes by default the GA style campaign parameters
-campaign_var_name = "pk_campaign,piwik_campaign,utm_campaign,utm_source,utm_medium"
+campaign_var_name = "pk_cpn,pk_campaign,piwik_campaign,utm_campaign,utm_source,utm_medium"
 
 ; Comma separated list of variable names that will be read to track a Campaign Keyword
 ; Example: If a visitor first visits 'index.php?piwik_campaign=Adwords-CPC&piwik_kwd=My killer keyword' ;
 ; then it will be counted as a campaign referrer named 'Adwords-CPC' with the keyword 'My killer keyword'
 ; Includes by default the GA style campaign keyword parameter utm_term
-campaign_keyword_var_name = "pk_kwd,piwik_kwd,pk_keyword,utm_term"
+campaign_keyword_var_name = "pk_kwd,pk_keyword,piwik_kwd,utm_term"
 
 ; maximum length of a Page Title or a Page URL recorded in the log_action.name table
 page_maximum_length = 1024;