Query OpenSSH for supported algorithms

The information about this can be gathered from OpenSSH man page.

Supported symmetric ciphers:

ssh -Q cipher

Supported symmetric ciphers that support authenticated encryption:

ssh -Q cipher-auth

Supported message integrity codes:

ssh -Q mac

Key exchange algorithms:

ssh -Q kex

Key types:

ssh -Q key

Certificate key types:

ssh -Q key-cert

Non-certificate key types:

ssh -Q key-plain

All key types and signature algorithms:

ssh -Q key-sig

Supported SSH protocol versions:

ssh -Q protocol-version

Supported signature algorithms:

ssh -Q sig