Limit conn: added shared context.

Previously only an rbtree was associated with a limit_conn.  To make it
possible to associate more data with a limit_conn, shared context is introduced
similar to limit_req.  Also, shared pool pointer is kept in a way similar to
2 files changed
tree: 8e30ae0c803d4130622158417141334341a0974b
  1. .hgtags
  2. auto/
  3. conf/
  4. contrib/
  5. docs/
  6. misc/
  7. src/