Correction of the log output of the practice node of stonith.

Correction of a possible point of the influence.
Correction of the log output of the practice node of stonith.(2)

Revise one next correction.
*
https://github.com/ClusterLabs/pacemaker/commit/a932361589964545f76376009d7ff7a61f03cab3
High: pengine: resource discovery mode for location constraints
Low: pengine: resource-discovery regression test
Fix: ping: Correctly advertise multiplier default

Advertise the multiplier default value in the meta data.
Low: ping: Add use_fping parameter

Add parameter that allows control over which ping
binary is used. If set to 0, fping will not be used,
instead ping is used even if fping is available.
Low: ping: Remove incorrectly advertised migrate_to|migrate_from
Low: ping: Pass extra options to fping
Low: ping: Correct metadata for attempts parameter
mainloop: fix potential segfault for fd = 0

Some monitoring software may explicitly *close* stdin,
(not just redirect from /dev/null).

That led to segfault, because the next allocated new fd would be 0,
mainloop_add_fd would return NULL (and the caller would not check).

Reproduce:
	crm_mon -1 <&-

Since 0 is a legal value for fd, allow it in mainloop_add_fd, too.
High: pengine: per-node control over resource discovery

By using the 'resource-discovery-enabled' node attribute, users
can disable/enable resource discovery (probes) on a per node
basis. By default, resource discovery is enabled still. No default
behavior has changed with the introduction of this option.
High: crm_resource: avoid deletion of lrm cache on node with resource discovery disabled.

This patch prevents users from deleting lrm cache on nodes that
have resource discovery disabled. Deleting the lrm cache in this
situation would result a failure to re-detect the resources currently
running on the node. Instead, lrm delete is skipped, but failcounts
are still cleaned up properly.
Low: pengine: regression test for pengine per node rsc discovery
Merge pull request #591 from lge/for-beekhof

mainloop: fix potential segfault for fd = 0
Merge pull request #590 from krig/ping-fixes

Fixes to the ping RA (bnc#899324)
Merge pull request #584 from HideoYamauchi/change_log

Correction of the log output of the practice node of stontih.
Log: cib: Improved tracing of callbacks
High: pengine: prevent disabling rsc discovery per node in certain situations

prevent disabling rsc discovery per node for cluster nodes
prevent disabling rsc discovery per node for baremetal nodes when
stonith is disabled.
Fix: xml: Prevent assert errors in crm_element_value() on applying a patch without version information

If the patch is generated with "crm_diff --no-version/-u".
Merge pull request #589 from davidvossel/master

resource-discovery location constraint option