Fix #1192 : use mysqli by default (cherry picked from commit ca3b3ba)
Fix #1192 : use mysqli by default
(cherry picked from commit ca3b3ba)

pydio/pydio-core,FredPassos/pydio-core,snw35/pydio-core,FredPassos/pydio-core,ChuckDaniels87/pydio-core,FredPassos/pydio-core,sespivak/pydio-core,pydio/pydio-core,snw35/pydio-core,sespivak/pydio-core,pydio/pydio-core,FredPassos/pydio-core,snw35/pydio-core,snw35/pydio-core,ChuckDaniels87/pydio-core,huzergackl/pydio-core,ChuckDaniels87/pydio-core,snw35/pydio-core,sespivak/pydio-core,snw35/pydio-core,FredPassos/pydio-core,FredPassos/pydio-core,sespivak/pydio-core,ChuckDaniels87/pydio-core,huzergackl/pydio-core,snw35/pydio-core,sespivak/pydio-core,huzergackl/pydio-core,huzergackl/pydio-core,sespivak/pydio-core,huzergackl/pydio-core,pydio/pydio-core,ChuckDaniels87/pydio-core,FredPassos/pydio-core,sespivak/pydio-core,pydio/pydio-core