Matthias Sohn
83f90a274c
Set config "extensions" option when converting ref storage format
When converting to reftable format the option extensions.refStorage must
be set to "reftable" [1]. When converting back to refdir format this
config option needs to be removed.
Introduce constants for refStorage config options, also for the
"reftree" format.
[1] https://git.eclipse.org/r/plugins/gitiles/jgit/jgit/+/master/Documentation/technical/reftable.md#Version-1
Change-Id: I190222fa5edc1ad7309daa9be17ca934ff7971e3
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>