Added a whitelist for charsets in MySQL adapter and PHP < 5.3.6.
Added a whitelist for charsets in MySQL adapter and PHP < 5.3.6.

Keep BC with previous Propel versions. Should fix a bunch of issues
with sfPropelORMPlugin and UTF8.

propelorm/Propel,david0/Propel2,sh0dow/Propel,staabm/Propel2,vdbf/Propel2,rozwell/Propel,SCIF/Propel2,propelorm/Propel3,rozwell/Propel,propelorm/Propel2,PatidarWeb/Propel,jarves/Propel2,fzaninotto/Propel2,mhitza/Propel,jarves/Propel2,Egston/Propel,Big-Shark/Propel2,farhanrahman/Propel2,mhitza/Propel2,Innometrics/Propel,adrianrusnarczyk/Propel,tbl0605/Propel-pervasive,marcj/Propel2,SwissalpS/Propel2,propelorm/Propel3,kitsunde/Propel2,gencer/Propel,cristianoc72/Propel2,bjdelange/Propel,nibsirahsieu/Propel2,gencer/Propel,Innometrics/Propel,jeffblack360/Propel2,kitsunde/Propel2,SCIF/Propel2,propelorm/Propel,jeremydenoun/Propel2,marcj/Propel2,AriaSystems/Propel,AriaSystems/Propel,vdbf/Propel2,david0/Propel2,fzaninotto/Propel2,halfer/Propel,ktounet/Propel2,peterkokot/Propel2,PatidarWeb/Propel,zachmay/Propel,ikeyan/Propel2,peterkokot/Propel2,nibsirahsieu/Propel2,ikeyan/Propel2,peter17/Propel2,propelorm/Propel3,ktounet/Propel2,halfer/Propel,jeffblack360/Propel2,fzaninotto/Propel2,zachmay/Propel,Big-Shark/Propel2,pimpreneil/Propel2,propelorm/Propel2,adrianrusnarczyk/Propel,marwein/Propel2,farhanrahman/Propel2,cristianoc72/Propel2,mhitza/Propel,SwissalpS/Propel2,peterkokot/Propel2,staabm/Propel2,Egston/Propel,mhitza/Propel2,jeremydenoun/Propel2,tbl0605/Propel-pervasive,peter17/Propel2,marwein/Propel2,bjdelange/Propel,pimpreneil/Propel2,sh0dow/Propel