Installer: Loosen restrictions on MySQL connection details
Installer: Loosen restrictions on MySQL connection details

Closes #602.

renyuneyun/core,Luceos/core,Albert221/core,Luceos/core,Albert221/core,Luceos/core,datitisev/core,Luceos/core,flarum/core,malayladu/core,datitisev/core,renyuneyun/core,datitisev/core,Albert221/core,datitisev/core,malayladu/core,flarum/core,flarum/core,renyuneyun/core,malayladu/core,malayladu/core,Albert221/core,renyuneyun/core