Bridge errors are currently included as part of the feed to
notify users about erroneous bridges (before that, bridges
silently failed).
This solution, however, can produce a high load of error
messages if servers are down (see #994 for more details).
Admins may also not want to include error messages in feeds
in order to keep those kind of problems away from users or
simply to silently fail by choice.
This commit adds a new configuration section "error" with
one option "output" which can be set to following values:
"feed": To include error messages in the feed (default)
"http": To return a HTTP header for each error
"none": To disable error reporting
Note that errors are always logged to 'error.log' independent
of the settings above.
Closes#1066
e8536ac1b2