updates for configure.in, Priority and PatternLayout.
updates for configure.in, Priority and PatternLayout.

ksmyth/log4cpp,orocos-toolchain/log4cpp,ksmyth/log4cpp,adobni/log4cpp,iocroblab/log4cpp,ksmyth/log4cpp,halex2005/log4cpp,halex2005/log4cpp,iocroblab/log4cpp,halex2005/log4cpp,iocroblab/log4cpp,adobni/log4cpp,adobni/log4cpp,orocos-toolchain/log4cpp