land 10800(adding llog ctxt refcount) to b1_6.
b=10800
i=green
i=shadow

b=12747
i=wangdi
i=scjody

LCONSOLE_ERROR(fmt, arg) to LCONSOLE_ERROR_MSG(0x000, fmt, ## arg).

b=10595
i=adilger

the build is broken with last commits. fixing

It also includes code fixes for first five improved error messages.

b=10595
i=adilger
i=braam

i=green
initialize per-export proc in non-recovery case.
report an error when attempting to change failout mode without writeconf

mounts. (recently introduced bug.)

r=adilger
Clarify watchdog timer units.
Add ability to change MDT ldlm timeout.

play nicer with parameters on logs upgraded from 1.4.x
- allows updates for old logs whenever we can (i.e. ok for mdc, not for osc)
- allows updates for everyone if --writeconf is specified at tunefs upgrade
time (requires entire fs to be stopped though)
- allows updates of failover partners if --writeconf is specified
- fixes various other little bugs and error messages
- adds a couple of regression tests for upgrading from 1.4.6

bad null-termination of 8-char filesystem names