[CONTENT REQUEST] document peer ids more thoroughly about ipfs-docs HOT 3 OPEN

• where's the key pair that the id is derived from?
• can i use it for other things, like in dapps?
• can i use it to encrypt and share stuff?
• should i? what are benefits and risks of doing so?

from ipfs-docs.

also, the docs are not consistent in how peer ids are referred to.

if you type peerid into search, you get zero results.

if you type peer id you get the glossary entry, which consistently uses peer id.

the glossary entry links to the dht page which doesn't use peer id at all, and only uses peerId.

from ipfs-docs.