I have created the patch to display the documentation link of variables in server_variables.php page. Please test this patch and suggest for further improvements.
https://sourceforge.net/tracker/?func=detail&aid=3212068&group_id=23067&atid=377410
I created a file server_variables_doc.php to store the variables details used to create the links in a array. The structure of the array is defined in the file itself. This values are first computed and passed to PMA_showMySQLDocu() to generate the url and stored in $doclink['variable_name'].
Samiran Raj Boro
Institute of Science and Technology
Gauhati University
Guwahati
sf username: srajbr
IRC nickname: samiran