mod_c2s: Advertise stanza size limit to clients Should help clients avoid sending stanzas that will get their stream killed. Custom namespace while ironing out the protocol. My spoon is too big!

mod_smacks: Factor out resumption token table key generation So that happens in a single place, where it can be changed easier.

Merge 0.12->trunk

Tag 0.12.2

mod_smacks: Only track resumable sessions Required due to track_session() having moved here

Merge 0.11->0.12

Tag 0.11.14

util.stanza: Allow U+7F Allowed by XML despite arguably being a control character. Drops the part of the range meant to rule out octets invalid in UTF-8 (\247 starts a 4-byte sequence), since UTF-8 correctness is validated by util.encodings.utf8.valid().

mod_smacks: Disable resumption behavior on s2s Since resumption is not supported on s2s currently, there is no point in allocating resumption tokens. The code that removes entries from session_registry is only invoked for c2s sessions, thus enabling resumable smacks on s2s adds an entry that never goes away.

util.hashring: Support associating arbitrary data with nodes In this API, a 'node' is always a simple text string. Sometimes the caller may have a more complex structure representing a node, but the hash ring is really only concerned with the node's name. This API change allows :add_nodes() to take a table of `node_name = value` pairs, as well as the simple array of node names previously accepted. The 'value' of the selected node is returned as a new second result from :get_node(). If no value is passed when a node is added, it defaults to `true` (as before, but this was never previously exposed).