This makes a bit less sense than adopting lfsr_bshrub_t in lfsr_bshrub_*
functions, but it gives LFSR_TAG_SHRUBCOMMIT/SHRUBTRUNK direct access to
the staging shrub without needing the shrub + 1 hack.
The whole shrub vs bshrub distinction is already a bit broken anyways,
with us relying on the opened-mdir list to correctly stage all shrubs in
the filesystem.
---
Curiously, this again ends up with net negative impact on code cost:
code stack ctx
before: 36484 2608 640
after: 36492 (+0.0%) 2608 (+0.0%) 640 (+0.0%)
Christopher Haster
aaae25243b