Remove unrecognised symbols from "$procuniq" 

Didn't research why exactly have lot of errors in log files and can't draw images, but removing some symbols (minuses, dots, slashes,... probably need to populate list) in "procuniq" internal variable removes the problems.
procuniq - remove symbols which is not a-zA-Z0-9_ 

common solution for the problem
Update proc.in

clean_fieldname()
Merge branch 'pr/146' into devel