mod_http_file_share: Let's write another XEP-0363 implementation
This variant is meant to improve upon mod_http_upload in some ways:
* Handle files much of arbitrary size efficiently
* Allow GET and PUT URLs to be different
* Remember Content-Type sent by client
* Avoid dependency on mod_http_files
* Built-in way to delegate storage to another httpd
Structure of a stanza:
stanza {
--- properties ---
tags -- array of tags
--- static methods ---
iq(attrs) --
--- read-only methods ---
reply -- return new stanza with attributes of current stanza
child_with_name(string name) -- return the first child of the current tag with the matching name
--- write methods ---
tag(name, sttrs) -- create a new child of the current tag, and set the child as current
up() -- move to the parent of the current tag
text(string) -- append a new text node to the current tag
}