Take out the false third party network endpoints

Fixes https://github.com/matrix-org/matrix-doc/issues/800

specification/application_service_api.rst

@@ -268,78 +268,11 @@ normal users who attempt to create users or aliases *inside* an application
 service-defined namespace will receive the same ``M_EXCLUSIVE`` error code,
 but only if the application service has defined the namespace as ``exclusive``.
 
-ID conventions
-~~~~~~~~~~~~~~
-.. TODO-spec
-  - Giving HSes the freedom to namespace still feels like the Right Thing here.
-  - Exposing a public API provides the consistency which was the main complaint
-    against namespacing.
-  - This may have knock-on effects for the AS registration API. E.g. why don't
-    we let ASes specify the *URI* regex they want?
-
-This concerns the well-defined conventions for mapping 3P network IDs to matrix
-IDs, which we expect clients to be able to do by themselves.
-
-User IDs
-++++++++
-Matrix users may wish to directly contact a virtual user, e.g. to send an email.
-The URI format is a well-structured way to represent a number of different ID
-types, including:
-
-- MSISDNs (``tel``)
-- Email addresses (``mailto``)
-- IRC nicks (``irc`` - https://tools.ietf.org/html/draft-butcher-irc-url-04)
-- XMPP (XEP-0032)
-- SIP URIs (RFC 3261)
-
-As a result, virtual user IDs SHOULD relate to their URI counterpart. This
-mapping from URI to user ID can be expressed in a number of ways:
-
-- Expose a C-S API on the HS which takes URIs and responds with user IDs.
-- Munge the URI with the user ID.
-
-Exposing an API would allow HSes to internally map user IDs however they like,
-at the cost of an extra round trip (of which the response can be cached).
-Munging the URI would allow clients to apply the mapping locally, but would force
-user X on service Y to always map to the same munged user ID. Considering the
-exposed API could just be applying this munging, there is more flexibility if
-an API is exposed.
-
-::
-
-  GET /_matrix/app/%CLIENT_MAJOR_VERSION%/user?uri=$url_encoded_uri
-
-  Returns 200 OK:
-  {
-    user_id: <complete user ID on local HS>
-  }
-
-Room Aliases
-++++++++++++
-We may want to expose some 3P network rooms so Matrix users can join them directly,
-e.g. IRC rooms. We don't want to expose every 3P network room though, e.g.
-``mailto``, ``tel``. Rooms which are publicly accessible (e.g. IRC rooms) can be
-exposed as an alias by the application service. Private rooms
-(e.g. sending an email to someone) should not
-be exposed in this way, but should instead operate using normal invite/join semantics.
-Therefore, the ID conventions discussed below are only valid for public rooms which
-expose room aliases.
-
-Matrix users may wish to join XMPP rooms (e.g. using XEP-0045) or IRC rooms. In both
-cases, these rooms can be expressed as URIs. For consistency, these "room" URIs
-SHOULD be mapped in the same way as "user" URIs.
-
-::
-
-  GET /_matrix/app/%CLIENT_MAJOR_VERSION%/alias?uri=$url_encoded_uri
-
-  Returns 200 OK:
-  {
-    alias: <complete room alias on local HS>
-  }
-
 Event fields
-++++++++++++
+~~~~~~~~~~~~
+
+.. TODO-TravisR: Fix this section to be a general "3rd party networks" section
+
 We recommend that any events that originated from a remote network should
 include an ``external_url`` field in their content to provide a way for Matrix
 clients to link into the 'native' client from which the event originated.