From Gerri:

- In XROOTD, disable the build by default of the client Perl interface: it
  generates several warnings from SWIG and it does not build on some systems
- Add a new option '--with-xrootd-opts="..."'  to 'configure' to specify
  additional configuration flags to xrootd; in this way those needing,
  for example, the Perl interface, they can get it by configuring with
   ./configure --with-xrootd-opts="--enable-perlint" <other-options>


git-svn-id: http://root.cern.ch/svn/root/trunk@22814 27541ba8-7e3a-0410-8455-c3a389f83636