doc: Describe trailing slash, merge double status heading
doc: Describe trailing slash, merge double status heading

Describe trailing slash and parents. Format options as code. Fix the
double "status" heading. Fix yahoo mode to say 4 conn.

[ci skip]

ArchiveTeam/ArchiveBot,ArchiveTeam/ArchiveBot,Asparagirl/ArchiveBot,JesseWeinstein/ArchiveBot,emijrp/ArchiveBot,emijrp/ArchiveBot,Frogging101/ArchiveBot,Asparagirl/ArchiveBot,Asparagirl/ArchiveBot,ArchiveTeam/ArchiveBot,emijrp/ArchiveBot,emijrp/ArchiveBot,falconkirtaran/ArchiveBot,JesseWeinstein/ArchiveBot,JesseWeinstein/ArchiveBot,ArchiveTeam/ArchiveBot,falconkirtaran/ArchiveBot,Frogging101/ArchiveBot,emijrp/ArchiveBot,Asparagirl/ArchiveBot,falconkirtaran/ArchiveBot,JesseWeinstein/ArchiveBot,JesseWeinstein/ArchiveBot,falconkirtaran/ArchiveBot,Frogging101/ArchiveBot,ArchiveTeam/ArchiveBot,Asparagirl/ArchiveBot,falconkirtaran/ArchiveBot,Frogging101/ArchiveBot,Frogging101/ArchiveBot