fsck: generate commit-graph with --reachable

pull: allow parameters for remote_manifest_command

pi-indexer: allow accepting extra config options from remote

pi-piper: fix crasher on "d" messages

Don't force url to contain hostname

Fix crash on trying to remove repository we never fsck'd

Update manpage for grok-pi-indexer

Set default boost to 1 when boosts are used

Add --toplevel and --pi-toplevel to pi-indexer

Fix pull_threads logic error

Adjust config and mangpage for grok-pi-indexer

Init all new inboxdirs before indexing them

Rework how we pass extra flags to public-inbox

Add ability to pass native public-inbox flags

Fix missed post_work_hook invocation