v2.9.0
Merge branch 'release/2.9.0' into production
Merge tag 'v2.9.0'

2.9.0

 * Add `options.rest.xml`, disable XML by default (Miroslav Bajtoš)

 * SharedMethod: add flag `documented` (Miroslav Bajtoš)

 * Add forgotten unit-tests for XML formatting (Joel Taylor)

 * Update jsonrpc-adapter.js (ericprieto)

 * Fixed a typo (Fabio)

 * Made test of mapped parameters on JSON RPC (Fabio)

 * Fix use of loose falsy comparison when getting arguments in HttpContext. (Samuel Reed)

 * Fix the jsonrpc adapter to reference the method correctly (Raymond Feng)