scalarisctl: add -s to chosse custom scalaris.local.cfg
scalarisctl: add -s to chosse custom scalaris.local.cfg

-s was handled by getopts but not used?!?

scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris,scalaris-team/scalaris