The mandoc search database generation uses each page's inode number as
a hash key to index hard linked pages only once. However, it also
processed the pages ordered by hash key resulting in effectively non-
deterministic output.
Instead:
1) provide fts_open() with a comparison function to process directories
and files in a deterministic order
2) in addition to the existing hash, insert pages into a linked list
which will be sorted (by virtue of 1)
3) iterate over pages by the list in 2, instead of hash order
I will work on upstreaming this change.
Reviewed by: bapt
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D8213
b422efa4c1