revision number of tlmgr does not appear in tlmgr conf output (TL2019 pretest)

[Karl Berry]

    or is there no connection between the tlmgr revision number and
    the texlive.infra package revision number ?

texlive.infra >= tlmgr

The tlmgr revision is when the tlmgr.pl file itself was last committed
(as is apparent from the first few lines of tlmgr.pl).  This is the case
for most of the core scripts that report revision numbers. -k