handle: clean up
Makefile: disable multi-thread support / add warnings
Implement directory operation

Add hook functionality against directories
Support new path managing algorithm using priority
Makefile: enable multi-thread support for interruption
eth: support automatic interface detection

 Now if you mkdir /net/eth/, then all interface files
will be created automatically (using dir_ops)
Merge branch 'dir_ops'

This merge implements directory operations support
It allows directories to support 'initialize','finalize'
Also automatic interfaces detection for eth operation added