Instead, use function that loops over groups and 
calculates  idle threads for  "show status".

Simplify thread attach/detach. Use connection specific mysys_var, rather than sharing worker thread's my_thread_var with THD.

e.g 
cmake . -DWITH_XXXX_STORAGE_ENGINE=1

fix misleading test name

MDEV-82 : Fix place in thr_lock.c where wait-end callback was called without corresponding wait-begin

Packagers may attempt to outsmart MariaDB/MySQL build system -DBUILD_SHARED_LIBS=1, we need to minimize the damage of such attempts.

geometry fields are blobs too.

- ensure that mtr supressions table is flushed before doing controlled crash and restart
- use DBUG_SUICIDE() rather than abort() in partition tests - avoids a crash message/warning
- disable  perfschema all_instances test on Windows- there are  legitimate reasons  for output to be different on  Unix (some different threads, some different locks), the differences are expected to grow in the future, e.g with threadpool.

Allow for faster creation of threads in corner cases where pool would be overloaded with long non-yielding queries. 
To allow it, change minimum of thread_pool_stall_limit to be 10 milliseconds.

Also introduce a new parameter to oversubscribe a group . Number of threads running in  parallel would be higher than it normally should, leading to thrashing, but it may improving preemptiveness, which is useful for the described corner case.

Note: to build with -fno-rtti as we currently build the server, boost version  1.45 or later is required.
(without -fno-rtti, 1.40 is enough)

LP909512: Fix crash on tp_set_threadpool_size if threadpool is not used(thread_handling != pool-of-threads)

Fixes valgrind warning.

Fix oqgraph build . Plugin does not need rtti, and does not load if rtti compile settings are different from server's