Revert "Merge pull request #558 from bbockelm/multisource-xrootd"

This reverts commit 680e3cb6b7933c3a1284786eeb4f339166acad24, reversing
changes made to 1e891db6be7d55f69186c24abff585bac714013b.
Merge pull request #724 from davidlt/revert-multisource-xrootd

Revert multisource xrootd