Instead of canonicalizing module names in the internal avl tree simpyl use a
custom strcmp() variant for the avl tree key comparisation. The custom comperator
simply treats dashes and underscores the same, so "nls_iso8859-15" is equal to
"nls-iso8859-15".
This allows us to simplify the code considerably and makes manual "modprobe"
invocations more forgiving when looking up the given module name.
SVN-Revision: 38248
d8c154a29d