Bot types

Nobody has claimed this yet.

Variable for bots `$categories` has some ambiguous types:

- `Feed Fetcher`, `Feed Parser`, `Feed Reader` - what's the difference, really?
- `Read-it-later Service` is used only for 2 items both for 1 thing: https://getpocket.com/pocketparser_ua. At the same time description on this page clearly says `crawling`, so should this not be `Crawler`?
- `Search tools` is used only for 1 item: http://www.shopwiki.com/w/Help:Bot. Again, description clearly states, that this is a crawler, so should this not be `Crawler`?
- How does `Security search bot` differ from `Security Checker`?
- How does `Service bot` differ from `Service Agent`?
- And probably the biggest of it all: what's the difference of `Search bot` from `Crawler`? I mean, crawling is done by search bots, so this seems to be the same thing.

I am fine with creating PR to harmonize these things a bit, but I think this warrants a proper discussion first.

Start by reviewing the $categories variable and the entries for Feed Fetcher, Feed Parser, Feed Reader, Read-it-later Service, Search tools, Security search bot, Security Checker, Service bot, Service Agent, Search bot, and Crawler. Compare their descriptions and usage, then seek agreement on the taxonomy before changing anything. Done means the bot categories are consistently defined and harmonized.

Written by the indexing model from the issue text.