Merge pull request #7 from fogti/fix-walk-deep-nested

Fix traversal into deeply nested directories

stricter about ptototypes

e* utils: add attributes to avoid analyzers assuming funcs can return…

… NULL

v0.3

* built-in support for dp9ik via tlsclient
* cosmetic documentation changes

Makefile: make it work with BSD make as well

fix ffi->fh bits/signedness confusion