Removed some static variables from output-pgsql.
Made `enable_way_area` not static.
Make `s_table` not static.
Made a note that `flagsname` and `tagflags` are OK as statics, and marked them const.
Wildcard matching should operate on const char arrays.
Removed a lot of static, global state variables from `output_pgsql_t`.
Merge remote-tracking branch 'MapQuest/kk_multiback' into mla_multi_backend

Conflicts:
	output-pgsql.cpp
start constifying and destaticifying middle-pgsql