mention requirements deadline (team#40472)

policy/tpa-rfc-36-gitolite-gitweb-retirement.md

@@ -17,6 +17,16 @@ TODO: redirections, migration procedures
 TODO: timeline
 TODO: consider TPA's git infrastructure (puppet? anything else?)
 
+## Requirements
+
+TODO: requirements
+
+### Must have
+
+### Nice to have
+
+### Out of scope
+
 # Personas
 
 TODO: personas
@@ -46,7 +56,10 @@ TODO: TPA + tor-internal?
 
 # Deadline
 
-TODO: define proposal deadline.
+Requirements are open for comments until July 25th at the soonest or
+mid-August at the latest.
+
+TODO: define actual proposal deadline.
 
 # Status