In xpdtest.cxx :
 - Use different technique for time outs
 - Add switch '-T timeout' contro the timeout value during connection
   or ping attempts (value in seconds)
 - Add switch '-p pidfile' to communicate the location of the process
   pid file; if this is defined, an existence check of the process is
   done before any other test
 - Add switch '-v' to set gDebug=1 where relevant
 - Make sure that the check for the esistence of the sandbox dir is only
   done when required, i.e. when the required test type is 2.

In man1/xpdtest.1:
 - Document new switches

In setxrd.sh:
 - Fix issue on zsh (see Savannah #99744)

In installXrootd.sh
 - Set default version 3.2.7


git-svn-id: http://root.cern.ch/svn/root/trunk@48439 27541ba8-7e3a-0410-8455-c3a389f83636