abpcrawler: Collect unmatched filters

I've made the crawler send data on matched filters and updated it for some other changes made in sitescripts for that purpose.

[Wladimir Palant, 2012-12-13 16:14:01]

LGTM but the comment might be worth addressing nevertheless.

http://codereview.adblockplus.org/8492018/diff/1/lib/crawler.js
File lib/crawler.js (right):

http://codereview.adblockplus.org/8492018/diff/1/lib/crawler.js#newcode24
lib/crawler.js:24: let currentFilter;
Initialize with null?

[Felix Dahlke, 2012-12-14 10:11:58]

Not entirely sure if I can safely merge this without merging 8492019 at the same
time.

http://codereview.adblockplus.org/8492018/diff/1/lib/crawler.js
File lib/crawler.js (right):

http://codereview.adblockplus.org/8492018/diff/1/lib/crawler.js#newcode24
lib/crawler.js:24: let currentFilter;
On 2012/12/13 16:14:01, Wladimir Palant wrote:
> Initialize with null?

I'd rather keep it undefined, like currentTabs etc. It's fals-y.

[Wladimir Palant, 2012-12-14 16:43:01]

If the only relevant change in 8492019 is the different backend URL then why not
just merge that one?

http://codereview.adblockplus.org/8492018/diff/1/lib/crawler.js
File lib/crawler.js (right):

http://codereview.adblockplus.org/8492018/diff/1/lib/crawler.js#newcode56
lib/crawler.js:56: if (currentFilter) {
Missed on the first pass - bracket should be on next line.

[Felix Dahlke, 2012-12-19 16:22:13]

I've added Eric as a reviewer.

Eric, this is some unmerged code to send the actual filters that matched to the
backend.

Please have a look and tell us if it makes sense to merge this. If not, feel
free to extract the parts you need manually, and we'll close the issue.

[Eric, 2012-12-20 16:53:15]

Go ahead and commit this. I haven't started working with this code yet, and I'd
prefer to have your most recent working version.