Comment 7 for bug 786645

Splited to several bugs.

#794350 :
 * main.init_connect

#794345:
 * main.percona_slow_extended-log_slow_filter
 * main.percona_slow_extended-microseconds_in_slow_extended
 * main.percona_slow_extended-min_examined_row_limit
 * main.percona_slow_extended-long_query_time
 * main.percona_slow_extended-use_global_long_query_time

#794348:
 * main.profiling
 * main.show_profile

#794366:
 * main.percona_innodb_buffer_pool_shm

Invalid:
 * main.percona_bug643149
 * main.percona_xtradb_bug317074