Fix problem exposed by recent commit to FindPythonInterp.
If the find "details" has new lines in it, then replace them
with literal "\n" two character sequences so that the string
may be saved as a cache entry that can be re-read next time
CMake runs.
This adds copyright/license notification blocks CMake's find-modules.
Many of the modules had no notices at all. Some had notices referring
to the BSD license already. This commit normalizes existing notices and
adds missing notices.
- Defines FIND_PACKAGE_MESSAGE function to help display
find result messages only once
- Added use of it to FindPackageHandleStandardArgs
- Added use of it to FindQt4, and FindX11
- This cleans up repeated messages in big projects
David Cole
Todd Gamblin
Brad King