change blacklist to blocklist

Let's use a more appropriate and clear word and discard the usage of the blacklist. Blocklist is clear. Happy for everyone.

Author: TrentZ

test/functional/feature_notifications.py

@@ -19,7 +19,7 @@
 # Windows disallow control characters (0-31) and /\?%:|"<>
 FILE_CHAR_START = 32 if os.name == 'nt' else 1
 FILE_CHAR_END = 128
-FILE_CHAR_BLACKLIST = '/\\?%*:|"<>' if os.name == 'nt' else '/'
+FILE_CHAR_BLOCKLIST = '/\\?%*:|"<>' if os.name == 'nt' else '/'
 
 
 def notify_outputname(walletname, txid):
@@ -32,7 +32,7 @@ def set_test_params(self):
         self.setup_clean_chain = True
 
     def setup_network(self):
-        self.wallet = ''.join(chr(i) for i in range(FILE_CHAR_START, FILE_CHAR_END) if chr(i) not in FILE_CHAR_BLACKLIST)
+        self.wallet = ''.join(chr(i) for i in range(FILE_CHAR_START, FILE_CHAR_END) if chr(i) not in FILE_CHAR_BLOCKLIST)
         self.alertnotify_dir = os.path.join(self.options.tmpdir, "alertnotify")
         self.blocknotify_dir = os.path.join(self.options.tmpdir, "blocknotify")
         self.walletnotify_dir = os.path.join(self.options.tmpdir, "walletnotify")