Merge pull request bitcoin#857 from Roasbeef/bip-157-filter-request-limit

BIP-0157: increase max getcfilters request to 1k blocks

Author: luke-jr

bip-0157.mediawiki

@@ -168,7 +168,7 @@ fields:
 
 # Nodes SHOULD NOT send <code>getcfilters</code> unless the peer has signaled support for this filter type. Nodes receiving <code>getcfilters</code> with an unsupported filter type SHOULD NOT respond.
 # StopHash MUST be known to belong to a block accepted by the receiving peer. This is the case if the peer had previously sent a <code>headers</code> or <code>inv</code> message with that block or any descendents. A node that receives <code>getcfilters</code> with an unknown StopHash SHOULD NOT respond.
-# The height of the block with hash StopHash MUST be greater than or equal to StartHeight, and the difference MUST be strictly less than 100.
+# The height of the block with hash StopHash MUST be greater than or equal to StartHeight, and the difference MUST be strictly less than 1000.
 # The receiving node MUST respond to valid requests by sending one <code>cfilter</code> message for each block in the requested range, sequentially in order by block height.
 
 ==== cfilter ====