Basically the upmerge of
   Bug#20414606 USE SINGLE QUOTES FOR PERL PATHS, IN CASE OF SPECIAL SYMBOLS
   Bug#20414565 DISABLE LARGE_TESTS.ALTER_TABLE IN DEBUG MODE
   Bug#20414569 STABILIZE TESTS THAT USE SHOW PROCESSLIST
with resolvced conflicts in
	mysql-test/r/sp-threads.result
	mysql-test/suite/funcs_1/r/processlist_priv_no_prot.result
	mysql-test/suite/funcs_1/r/processlist_priv_ps.result
	mysql-test/suite/funcs_1/r/processlist_val_no_prot.result
	mysql-test/suite/funcs_1/r/processlist_val_ps.result
	mysql-test/suite/large_tests/t/alter_table.test