If the value of $MANPATH starts with a colon, then the default
search path is added at its start. If the value of $MANPATH ends
with a colon, then the default search path is added at its end.
If the value of $MANPATH contains a double colon (::), then the
default search path is inserted in the middle of the value,
between the two colons.
man pages are not working when CVMFS is loaded.
https://icecube-spno.slack.com/archives/C015DUGSTA5/p1716208022564999