Add compatibility section and remove bit

Author: shaolinfry

bip-segwit-uasf.mediawiki

@@ -30,12 +30,16 @@ This deployment will set service bit (1<<5) as NODE_UAWITNESS.
 
 ==Deployment==
 
-This BIP will be deployed by BIP8 with the name "uasegwit" and using bit TBD.
+This BIP will be deployed by BIP8 with the name "segwit" and using bit TBD.
 
 For Bitcoin mainnet, the BIP8 starttime will be midnight 16 November 2017 UTC (Epoch timestamp 1510790400) and BIP8 timeout will be 4 July 2018 UTC (Epoch timestamp 1530662400).
 
 For Bitcoin testnet, segwit is already activated so no deployment is specified.
 
+==Backwards Compatibility==
+
+This deployment reuses the GBT deployment name "segwit" to maintain compatibility with existing mining software.
+
 ==Rationale==
 
 This BIP can be deployed well in advance of the BIP8 '''starttime''' so that the '''timeout''' will be sufficiently far in the future to allow Bitcoin users to upgrade in preparation.