logging: cli options to filter for modules using -v

old style "-v" still works

filtering examples:
-v=debug,network=error,interface=error      // effectively blacklists network and interface
-v=warning,network=debug,interface=debug    // effectively whitelists network and interface

run_electrum

@@ -83,7 +83,7 @@ from electrum import SimpleConfig
 from electrum.wallet import Wallet
 from electrum.storage import WalletStorage, get_derivation_used_for_hw_device_encryption
 from electrum.util import print_msg, print_stderr, json_encode, json_decode, UserCancelled
-from electrum.util import set_verbosity, InvalidPassword
+from electrum.util import InvalidPassword
 from electrum.commands import get_parser, known_commands, Commands, config_variables
 from electrum import daemon
 from electrum import keystore
@@ -277,6 +277,9 @@ if __name__ == '__main__':
         sys.argv.append('-h')
 
     # old '-v' syntax
+    # Due to this workaround that keeps old -v working,
+    # more advanced usages of -v need to use '-v='.
+    # e.g. -v=debug,network=warning,interface=error
     try:
         i = sys.argv.index('-v')
     except ValueError:
@@ -324,10 +327,7 @@ if __name__ == '__main__':
     if config_options.get('portable'):
         config_options['electrum_path'] = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'electrum_data')
 
-    # kivy sometimes freezes when we write to sys.stderr
-    log_verbosity = config_options.get('verbosity') if config_options.get('gui') != 'kivy' else ''
-    set_verbosity(log_verbosity)
-    if not log_verbosity:
+    if not config_options.get('verbosity'):
         warnings.simplefilter('ignore', DeprecationWarning)
 
     # check uri