Finding lines where redefs occurred

[seth]

First, support would need added to Bro for finding all of the lines and scripts where redef's against a certain variable occurred. I would also like to see this support added through broctl.

Here's the scenario...

[BroControl] > find redef ignore_checksums
/usr/local/bro/share/bro/bro.init:360 const ignore_checksums = F &redef;
/usr/local/bro/share/bro/site/local.bro:133 redef ignore_checksums = T;

This is relating to a discussion I had about trouble people have with starting with Bro and the gotcha's encountered from enabling the cluster support. There are so many redef's happening and potentially without the user realizing it.

[robin]

More generally, we could do a "config grep" that greps through all scripts that are loaded by the current config.Would then, e.g., also work for events.