Apply language cleanup mega patch.
black/white_function_list -> write_function_list, read_only_function_list
black_query_pattern -> primay_routing_query_pattern
black/white_memqcache_table_list -> cache_unsafe/cache_safe_table_list
Watchdog: replace master to 'leader' for 'master' watchdog nodes
ALWAYS_MASTER flag is changed to ALWAYS_PRIMARY.
Replace relcache_query_target option 'master' to 'primary'.
Replace Master Node with Main node ( node id with 0 or youngest live ).
Replace follow_master with follow_primary with parameters.
Replace some remaining occurrences of master with primary/main/leader
Patch contributed by: Umar Hayat
Reviewed by me:
projects / pgpool2.git / commit