Move NetFS to a package

This is based on Jalopeura's patch to #10191, however, there are some
changes.
From the patch:
* Make userlandfs use separate "interface definition" files for each
filesystem, so the netfs package can provide a configuration file
* Add a short document on how to use NetFS
* Various fixes to netfs to make it build again (volatile atomics)
* The netfs_mount script for easier use of NetFS

Additional fixes:
* Move netfs_mount and the interface description file to data/ in the
source tree
* Use strlcat instead of strcat to avoid a buffer overflow
* Some parts were already applied in previous commits

NetFS: fix build.

Fixes #11168.

Copied Ingo's netfs from the dark pit in which it was forgotten to something
more visible and ported it to the current UserlandFS server (and GCC4). It still
uses the R5 file system API, which the UserlandFS conveniently still provides
support for. It compiles and links, but is otherwise still untested. The changes
I am alsmost confident that I didn't change any semantics. That is unless
HashMap, HashString and DoublyLinkedList work differently enough to make any of
the netfs code break.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35081 a95241bf-73f2-0310-859d-f6bbb57e9c96

Move NetFS to a package

This is based on Jalopeura's patch to #10191, however, there are some
changes.
From the patch:
* Make userlandfs use separate "interface definition" files for each
filesystem, so the netfs package can provide a configuration file
* Add a short document on how to use NetFS
* Various fixes to netfs to make it build again (volatile atomics)
* The netfs_mount script for easier use of NetFS

Additional fixes:
* Move netfs_mount and the interface description file to data/ in the
source tree
* Use strlcat instead of strcat to avoid a buffer overflow
* Some parts were already applied in previous commits

NetFS: fix build.

Fixes #11168.

Copied Ingo's netfs from the dark pit in which it was forgotten to something
more visible and ported it to the current UserlandFS server (and GCC4). It still
uses the R5 file system API, which the UserlandFS conveniently still provides
support for. It compiles and links, but is otherwise still untested. The changes
I am alsmost confident that I didn't change any semantics. That is unless
HashMap, HashString and DoublyLinkedList work differently enough to make any of
the netfs code break.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35081 a95241bf-73f2-0310-859d-f6bbb57e9c96