Merge branch '5.5-galera' into 10.0-galera

Fix for some failing tests.

increase the VERSION

correct the NULL-pointer test

Merge branch 'bb-10.1-serg' into 10.1

MDEV-7903 : xtrabackup SST failing with maria-10.0-galera

Remove master-bin.state file on joiner node during SST.

Update SELinux policy to allow UDP for multicast repl in galera.

MDEV-5309 - RENAME TABLE does not check for existence of the table's …

…engine

fix the test case for ps-protocol

tests for MDEV-7937: Enforce SSL when --ssl client option is used

* add a test when server certificate is verified successfully
* one test with two combinations (instead of two tests)
* verbose tets: make it print what it is doing
* fix the test to work with yassl and no-ssl builds

fix for 32-bit tests