container: enter init path early

There is generally no use case where any setup is required before init, and requiring the explicit function call is error-prone and unnecessary. It also causes trouble with packages using a similar trick. This change moves argv0 check early and makes it an import side effect. The stub will be removed in v0.5.

Signed-off-by: Ophestra <cat@gensokyo.uk>

container/initdev.go

@@ -1,7 +1,6 @@
 package container
 
 import (
-	"encoding/gob"
 	"fmt"
 	"path/filepath"
 	. "syscall"
@@ -10,8 +9,6 @@ import (
 	"hakurei.app/fhs"
 )
 
-func init() { gob.Register(new(MountDevOp)) }
-
 // Dev appends an [Op] that mounts a subset of host /dev.
 func (f *Ops) Dev(target *check.Absolute, mqueue bool) *Ops {
 	*f = append(*f, &MountDevOp{target, mqueue, false})