sql.py: Added mk_insert_select() and use it in insert_select()

db_xml.py: put_table(): Use new insert_select()

sql.py: insert_select(): Changed order of cols and params arguments so select_query and params would be together

sql.py: Added insert_select() and use it in insert()

Calls to sql.esc_name*(): Removed preserve_case=True because it is now the default

sql.py: esc_name_by_module(): Changed preserve_case to ignore_case, which defaults to False

Calls to sql.esc_name*(): Removed preserve_case=True because it is now the default

sql.py: esc_name_by_module(): preserve_case defaults to True

sql.py: mk_select(): Escape all names used (table, column, cond, etc.)

sql.py: esc_name_by_module(): If not enclosing name in quotes, call check_name() on it