Merge pull request bitcoin#294 from afk11/bip142-typo

142: typo in References section

Author: luke-jr

bip-0142.mediawiki

@@ -146,7 +146,7 @@ https://github.com/theuni/bitcoin/commit/ede1b57058ac8efdefe61f67395affb48f2c0d8
 
 * [[bip-0013.mediawiki|BIP 13: Address Format for pay-to-script-hash]]
 * [[bip-0016.mediawiki|BIP 16: Pay to Script Hash]]
-* [[bip-0070.mediawiki|BIP 70: Payment Protocal]]
+* [[bip-0070.mediawiki|BIP 70: Payment Protocol]]
 * [[bip-0141.mediawiki|BIP 141: Segregated Witness]]
 
 == Copyright ==