The use of an unordered hashmap means that the output of
'journalctl --update-catalog' differs between runs despite there being no
changes in the input files.
By changing all instances of Hashmap to OrderedHashmap we fix this, and now
the catalog is reproducible.
Motivation: https://reproducible-builds.org
Signed-off-by: Daniel Edgecumbe <git@esotericnonsense.com>
This splits out a bunch of functions from fileio.c that have to do with
temporary files. Simply to make the header files a bit shorter, and to
group things more nicely.
No code changes, just some rearranging of source files.
