Fix homeserver verification with wildcards certificates.

Disable v2 by default.
Add migration to fix the accepted table (due to sqlite unable to change constraint, drop table and create again).
Fix displaying the expiration period of the new token.
Remove duplicated code.
Use v1 single lookup when receive the request with `none` algorithm and the only one argument.
Hide v2 endpoint if v2 API disabled.

docs/MSC2140_MSC2134.md

@@ -7,7 +7,7 @@ Default values:
 ```.yaml
 matrix:
   v1: true   # deprecated
-  v2: true
+  v2: false
 ```
 
 To disable change value to `false`.
@@ -19,8 +19,14 @@ matrix:
 ```
 NOTE: Riot Web version 1.5.5 and below checks the v1 for backward compatibility.
 
+NOTE: v2 disabled by default in order to preserve backward compatibility.
+
 ## Terms
 
+###### Requires: No. 
+
+Administrator can omit terms configuration. In this case the terms checking will be disabled.
+
 Example:
 ```.yaml
 policy:
@@ -45,7 +51,7 @@ Where:
 - `version` -- the terms version.
 - `lang` -- the term language.
 - `name` -- the name of the term.
-- `url` -- the url of the term.
+- `url` -- the url of the term. Might be any url (i.e. from another host) for a html page.
 - `regexp` -- regexp patterns for API which should be available only after accepting the terms.
 
 API will be checks for accepted terms only with authorization.
@@ -72,6 +78,10 @@ There is only one exception: [`POST /_matrix/identity/v2/terms`](https://matrix.
 
 Hashes and the pepper updates together according to the `rotationPolicy`.
 
+###### Requires: No. 
+
+In case the `none` algorithms ma1sd will be lookup using the v1 bulk API.
+
 ```.yaml
 hashing:
   enabled: true # enable or disable the hash lookup MSC2140 (default is false)