mq: comply with filtering when injecting fake tags (issue3812)
mq was injecting fake tags whenever the revisions were accessible
to the filtering level.
This issue impacts hgweb since it's common to have "secret" mq
patches. As secret changesets are filtered by hgweb, the tags
computation could break.
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved