When adding a filter mapping on an extension, the mapping is copied to the sub-path and it must be changed to a MAP_PATH_EXTENSION so that we distinguish it from MAP_EXTENSION in case another filter mapping adds a filter.
When adding a filter mapping on an extension, the mapping is copied to
the sub-path and it must be changed to a MAP_PATH_EXTENSION so that we
distinguish it from MAP_EXTENSION in case another filter mapping adds
a filter.


stcarrez/ada-asf,stcarrez/ada-asf,stcarrez/ada-asf