Replaced usage of strtok_r with std::string operations.  strtok_r is deprecated on some systems and is not available on some flavors of Cygwin.
Replaced usage of strtok_r with std::string operations.  strtok_r is
deprecated on some systems and is not available on some flavors of
Cygwin.



git-svn-id: ffc1bc5b3feaf8644044862cc38c386ade156493@4305 434f946d-2f3d-0410-ba4c-cb9f52fb0dbf

certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh