compiler warnings
cleanup: remove table->status from some engines

from engines that we don't need to merge from
a third-party repository on a regular basis
cleanup: remove libedit, move readline to extra/
bugfix: disabling partitioning in already built tree

that didn't quite work, WITH_PARTITION_STORAGE_ENGINE
was not undefined
cleanup: remove redundant clauses from sys_vars.cc
cleanup: use is_supported_parser_charset
cleanup: galera merge, simple changes
bugfix: remove the code that broke XA recovery
disable wsrep by default.
fix wsrep not to crash when started disabled
fix cmake detection of bfd.h
cleanup: remove galera/wsrep magic from mtr
correct handling on defaults[-extra]-file is SST scripts

pass --defaults-file and --defaults-extra-file
(whatever was specified, or none)
from mysqld down to SST scripts.

parse these options in SST scripts and pass them down
to mysqldump, my_print_defaults, and xtrabackup
extend SHA1 service. cleanup of sha1 wrappers
MD5 service
use MD5 service in innodb/xtradb
fixing embedded: first set of changes (storage engines don't work yet)
fixing embedded: WaaS. Wsrep as a Service.
small cleanup
cleanup: wsrep_check_opts
restore and fix wsrep status variables