add wpad translation units for automatic proxy discovery
add file protocol to curl
loop through means of auto-config proxy locations
use proxy auto config if CVMFS_HTTP_PROXY=auto
add pacparser external dependency
parse pac files
allow for mixed auto/manual proxy settings
use auto proxy discovery in libcvmfs
fix download of pac file into memory
use auto proxy in talk module
add __wpad__ process flavor to resolve auto proxy
resolve auto proxy in cvmfs_config chksetup
resolve auto proxy in Nagios check
make CVMFS_HTTP_PROXY=auto default