Implement MSC3952: Intentional mentions (#14823)

MSC3952 defines push rules which searches for mentions in a list of
Matrix IDs in the event body, instead of searching the entire event
body for display name / local part.

This is implemented behind an experimental configuration flag and
does not yet implement the backwards compatibility pieces of the MSC.

1 files changed, 5 insertions, 0 deletions

diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py

index 2590c88cde..d2d0270ddd 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -168,3 +168,8 @@ class ExperimentalConfig(Config):
 
         # MSC3925: do not replace events with their edits
         self.msc3925_inhibit_edit = experimental.get("msc3925_inhibit_edit", False)
+
+        # MSC3952: Intentional mentions
+        self.msc3952_intentional_mentions = experimental.get(
+            "msc3952_intentional_mentions", False
+        )