MB-7250:  use "2.1.1" branch for 2.5.0.

This change does not change revision included, as HEAD of 2.1.1
branch is currently at 97fd781edaa109bf99f6f002ae5c562c8b829438.

Subsequent commits may advance the revision used.

Change-Id: I52c51e01f513efafa47983ea4a7f40e04e1f95d1
Reviewed-on: http://review.couchbase.org/30422
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>
Move couchbase-cli and couchbase-examples to cmake

Change-Id: I4338aa6e29241682e29858b6954f620195da0b40
MB-8102:  fix moxi segfault due to overflowed file descriptors

replaces abandoned http://review.couchbase.org/#/c/30424/

Change-Id: I5b91d204cf334fc600d4799da95f7f2ed1d76cd4
Reviewed-on: http://review.couchbase.org/30431
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>