Update functions.php

function getParameterValue if not found, empty string will be return, fix it.
fmDNS - #162 - Fixed zone display with limited user access
fmDNS - Fixed zone menu badges with limited user access
Merge pull request #163 from newphp/patch-1

Update client getParameterValue in functions.php to handle empty parameters
notes
Fixed database cleanup routine
Version bump
Merge github.com:WillyXJ/facileManager