SERVER-13648 backport cursors waiting periodic message for range deletion
SERVER-14032 verify _id present for upserts to multiple config servers
(cherry picked from commit 108ec7640743a97d2e02a081ef16d0c4da748c67)
SERVER-9526 a more elegant solution to printout of BinData in log messages

This commit changes the behaviour of BSONElement::toString() to print BinData in the same way as the other element types. It puts a cap on the lenght of the binary data in the same way as for string. Using full == true overrides the cap in the same way.

Signed-off-by: Greg Studer <greg@10gen.com>
(cherry picked from commit 54845ac08d80b9556cbcbea711ad0529feb09c0f)
SERVER-13615 sharding_rs2.js intermittent failure due to reliance on opcounters

(cherry picked from commit 8a2d33b071b5c528a65bb921cc778cef31500425)
Merge remote-tracking branch 'upstream/v2.6' into v2.6