mod_http_muc_log: Fix exception on lack of trailing slash in room path A request to /room leads to the match call returning nil which in turn calls nodeprep(nil). In Prosody 0.11.x this does nothing and simply returns the nil, while in 0.12 it is an error. Now it redirects to the calendar view at /room/ - even for non-existant rooms. Discovered at a deployment with http_paths = { muc_log = "/" } and requests to /robots.txt and similar, which now result in a uses redirect before returning 404.

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summary: Injects ecaps2 elements (XEP-0390) in presence
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Description
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This module injects ecaps2 elements in the presence once the legacy caps
(XEP-0115) are received.

Compatibility
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  ------- ---------------
  trunk   Works
  0.11    Does not work
  0.10    Does not work
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