improvement: disable limit_scrapers by default

This is a good feature, but will limit valid requests from being
served.  Defaulting this to off will be less surprising to relay ops.

Author: scsibug

config.toml

@@ -158,7 +158,7 @@ reject_future_seconds = 1800
 # Rejects imprecise requests (kind only and author only etc)
 # This is a temperary measure to improve the adoption of outbox model
 # Its recommended to have this enabled
-limit_scrapers = true
+limit_scrapers = false
 
 [authorization]
 # Pubkey addresses in this array are whitelisted for event publishing.