Improved exit policy syntax; basic client-side DNS caching.
- Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and bitcounts
18.0.0.0/8. Policies are parsed on startup, not when comparing to them.
- desired_path_len is now part of an opaque cpath_build_state_t structure.
- END_REASON_EXITPOLICY cells no longer include a port.
- RELAY_COMMAND_CONNECTED cells now include the IP address we've connected
to.
- connection_edge now has a client_dns cache to remember resolved addresses.
It gets populated by RELAY_COMMAND_CONNECTED cells and END_REASON_EXITPOLICY
cells. It gets used by connection_ap_handshake_send_begin. We don't
compare it to exit policies yet.
svn:r812