Performance: Reducing the number of characters visited while scanning a URI. A URI has a scheme if it contains a ':' which is not preceeded by a '?', '/', '#'.  If a ':' has been found in the string, we need only search to the left of it instead of over the entire string.
Performance: Reducing the number of characters visited while
scanning a URI. A URI has a scheme if it contains a ':' which is
not preceeded by a '?', '/', '#'.  If a ':' has been found in the
string, we need only search to the left of it instead of over
the entire string.


git-svn-id: 21df804813e9d3638e43477f308dd0be51e5f30f@319867 13f79535-47bb-0310-9956-ffa450edef68

jimma/xerces,RackerWilliams/xercesj,RackerWilliams/xercesj,ronsigal/xerces,jimma/xerces,ronsigal/xerces,RackerWilliams/xercesj,jimma/xerces,ronsigal/xerces