changed gzip check to regex which works better and more accurate then strpos, and it also supports the special syntax like 'gzip;q=0,deflate;q=0' and not only 'gzip, deflate'
changed gzip check to regex which works better and more accurate then strpos, and it also supports the special syntax like 'gzip;q=0,deflate;q=0' and not only 'gzip, deflate'

git-svn-id: 68b7a25618b2252832030a39cdae4f88b9d509c5@1658 1f8fe7d8-47f0-464c-8d0a-336f4953ab05

h4rdc0m/pimcore,kanevbg/pimcore,jnstr/pimcore,h4rdc0m/pimcore,yasarkunduz/pimcore,yasarkunduz/pimcore,h4rdc0m/pimcore,kanevbg/pimcore,StephanWeinhold/pimcore,StephanWeinhold/pimcore,yasarkunduz/pimcore,yasarkunduz/pimcore,h4rdc0m/pimcore,daaquan/pimcore,ChristianBre/pimcore,ChristianBre/pimcore,daaquan/pimcore,StephanWeinhold/pimcore,daaquan/pimcore,Ahmad-Hilali/pimcore,ChristianBre/pimcore,kanevbg/pimcore,daaquan/pimcore,jnstr/pimcore,h4rdc0m/pimcore,ChristianBre/pimcore,h4rdc0m/pimcore,jnstr/pimcore,StephanWeinhold/pimcore,yasarkunduz/pimcore,Ahmad-Hilali/pimcore,jnstr/pimcore,yasarkunduz/pimcore,kanevbg/pimcore,daaquan/pimcore,Ahmad-Hilali/pimcore,Ahmad-Hilali/pimcore,daaquan/pimcore