Borer tweaks/additions.

With thanks to RobRichards1997 and /tg/ for the fixes ganked out of their port diff discussion (and the event code).

- Adds a borer event to the admin verbs.
- Adds sugar docility, alkysine secretion and a short-ranged paralysis attack to borers.
- Adds borer detection to medical HUDs, handheld scanners and the advanced body scanner.
- Fixes various ckey altering procs to not mess with borer-infected mobs.
- Adds ghostears for borer -> host and host -> controlling borer speech.
- Other small tweaks and fixes.