Make configuration enums in lowercase. Wrap create hashes by try-catch. Add initial part of the documentation.

docs/MSC2140_MSC2134.md

@@ -0,0 +1,47 @@
+# MSC2140
+
+## V1 vs V2
+In the [MSC2140](https://github.com/matrix-org/matrix-doc/pull/2140) the v2 prefix was introduced.
+
+Default values:
+```.yaml
+matrix:
+  v1: true   # deprecated
+  v2: true
+```
+
+To disable change value to `false`.
+
+NOTE: the v1 is deprecated, therefore recommend to use only v2 and disable v1 (default value can be ommited):
+```.yaml
+matrix:
+  v1: false
+```
+
+## Terms
+
+Example:
+```.yaml
+policy:
+  policies:
+    term_name: # term name
+      version: 1.0 # version
+      terms:
+        en:  # lang
+          name: term name en  # localized name
+          url: https://ma1sd.host.tld/term_en.html  # localized url
+        fe:  # lang 
+          name: term name fr  # localized name
+          url: https://ma1sd.host.tld/term_fr.html  # localized url
+      regexp:
+        - '/_matrix/identity/v2/account.*'
+        - '/_matrix/identity/v2/hash_lookup'
+```
+Where:
+
+- `term_name` -- name of the terms.
+- `regexp` -- regexp patterns for API.
+
+
+## Hash lookup
+

docs/configure.md

@@ -48,6 +48,9 @@ Create a list under the label `myOtherServers` containing two Identity servers:
 ## Unbind (MSC1915)
 - `session.policy.unbind.enabled`: Enable or disable unbind functionality (MSC1915). (Defaults to true).
 
+## Hash lookups, Term and others (MSC2140, MSC2134)
+See the [dedicated document](MSC2140_MSC2134.md) for configuration.
+
 *Warning*: Unbind check incoming request by two ways:
 - session validation.
 - request signature via `X-Matrix` header and uses `server.publicUrl` property to construct the signing json;