Add coda_pathconf() always returning EINVAL.

- move debugging functions to vcoda so modules with -DDEBUG link
- fix writing to coda files. this is probably not the right way to do
this, but it satisfies the locking protocol:
1. Sometimes coda_open() is called with an unlocked vnode which
does not satisfy the locking protocol. Lock it for now. We
need to find out why this happens
2. VFS_VGET sometimes returns the container vnode unlocked. What
is the locking protocol for VFS_VGET? We also lock it here.

-fno-common fallout.

Fixes from get/putpages from rmind.
In grab vnode, share the lock of the coda vnode with the underlying vnode,
so that the locking protocol works.

branches: 1.13.98; 1.13.102;
integrate kauth.

branches: 1.12.4; 1.12.6; 1.12.8; 1.12.10; 1.12.12;
merge ktrace-lwp.

* Remove __P()
* Use ANSI function declarations

branches: 1.10.4;
nuke trailing whitespace

branches: 1.9.2; 1.9.10; 1.9.12;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Undo part of the ktrace/lwp changes. In particular:
* Remove the "lwp *" argument that was added to vget(). Turns out
that nothing actually used it!
* Remove the "lwp *" arguments that were added to VFS_ROOT(), VFS_VGET(),
and VFS_FHTOVP(); all they did was pass it to vget() (which, as noted
above, didn't use it).
* Remove all of the "lwp *" arguments to internal functions that were added
just to appease the above.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

add coda_{get,put}pages so that mmap works.

branches: 1.5.12;
nuke RCS "Log" tags. They cause problems for third parties importing
our sources, and for NetBSD release engineering folks. (They've
been against the NetBSD coding style forever, but they crept in anyway.)

branches: 1.4.12;
Final piece of rename cfs->coda

Change cfs/CFS in symbols, strings and constants to coda/CODA
to avoid fs conflicts.

Pass2 complete

branches: 1.1.1;
Initial revision