patch: compile fixes

Hi,

As I lost my commit rights I'm posting a patch to fix certain
compilation buglets I've encountered in the opie mainline.

List of changes:

- removal of default arguments in method implementations
- namespace fixes (connect(2) and close(2) are not in std)
- missing return statements (attempt to return void in a non-void
  functions)
- syntax errors ('/' change, missing return in
  PackageList::getByName)
- misc warning fixes (implicit typename, NULL passed for non-pointer
  argument, explicit zero termination in c string)
  

Simon