This adds the following status variables:
* wsrep_local_recv_queue_max
* wsrep_local_recv_queue_min
* wsrep_local_send_queue_max
* wsrep_local_send_queue_min

All of these are reset when the status variables are read just like
wsrep_local_recv_queue_avg and wsrep_local_send_queue_avg.
Document the meaning of fc_master_slave
reintroduce DOC for fc_limit that says "For master-slave setups this number can be increased considerably."
spelling fix in code comments
update to lastest 3.x
Remove query_cache=0 documentation

based off https://bugs.launchpad.net/codership-mysql/+bug/1279220 it
seems query_cache enable is possible. Lets show this in the
documentation.
merge doco from 3.x
Update protostack.cpp

After calling push_front() on a std::deque<>, iterators become invalid per the C++ standard ("after push_back() and push_front() all references stays valid, but iterators don't"). 

Using prev_begin after the push_front() call results in undefined behavior. This fix removes the usage of an invalid iterator and makes the intent of the code more clear.
Update protostack.cpp

(fixed whitespace)
Misc chores:
1) fixed logic to disable building RPMs
2) corrected potentially misleading info message about using CRC-32C for message chcecksums
merge from 3.x
innodb_flush_log_at_trx_commit=0 based on http://openquery.com.au/blog/innodbflushlogsontrxcommit-galeracluster
add code-block:: ini docs/source/configuration.rst
Merge branch '3.x' of https://github.com/AndreasVerhoeven/galera into AndreasVerhoeven-3.x
Merge branch 'AndreasVerhoeven-3.x' into 3.x
Ref #61 updates to admin guide
refs #74 - fixed compiler error
refs #89 - first version of deb packaging.
refs #89 script to build debs, improved package description, debug symbols
Merge pull request #86 from openquery/innodb_flush_log_at_trx_commit

innodb_flush_log_at_trx_commit=0 based on oq blog