doc: update erasure code development doc

With a link to the tracker issue implementing the new indep mode.

Signed-off-by: Loic Dachary <loic@dachary.org>
Document librados's rados_write's behaviour in reguards to return value.
common: format Throttle test to 80 columns

Signed-off-by: Loic Dachary <loic@dachary.org>
common: fix rare race condition in Throttle unit tests

The thread created to test Throttle race conditions updates a value (
throttle.get_current() ) that is tested by the main gtest thread but is
not protected by a lock. Instead of adding a lock, the main thread tests
the value after pthread_join() on the child thread.

http://tracker.ceph.com/issues/6679 fixes #6679

Signed-off-by: Loic Dachary <loic@dachary.org>
ceph-disk: zap needs at least one device

If given no argument, ceph-disk zap should display the usage instead of
silently doing nothing. Silence can be confused with "I zapped all the
disks".

http://tracker.ceph.com/issues/6981 fixes #6981

Signed-off-by: Loic Dachary <loic@dachary.org>
osd: format test_osd_types.cc to 80 columns

Signed-off-by: Loic Dachary <loic@dachary.org>
mon: typo s/degrated/degraded/

http://tracker.ceph.com/issues/6736 refs #6736

Signed-off-by: Loic Dachary <loic@dachary.org>
Merge pull request #948 from dachary/wip-6736-1

mon: typo s/degrated/degraded/

Backport: emperor, dumpling
Merge pull request #944 from dachary/wip-6679

common: fix rare race condition in Throttle unit tests

Reviewed-by: Sage Weil <sage@inktank.com>
Merge pull request #945 from dachary/wip-6981

ceph-disk: zap needs at least one device

Reviewed-by: Sage Weil <sage@inktank.com>
Merge pull request #946 from dachary/wip-80-column

osd: format test_osd_types.cc to 80 columns
Merge pull request #924 from dachary/wip-erasure-doc

doc: update erasure code development doc
Merge pull request #937 from christian-marie/master

Document librados's rados_write's behaviour in reguards to return value.
Merge git://github.com/ceph/ceph