work on codec mode jpeg
set codec mode according to client
addec checks for TurboJPEG in autoconf
only check for tjpeg if --enable-tjpeg is passed
opps, it's enable_tjpeg, not enable_tpeg
changed turbojpeg help message in configure.ac
improve debugging dump jpeg for codec mode
keygen: started adding bits for bigger rsa key size
Merge branch 'devel' of github.com:neutrinolabs/xrdp into devel