Change in osmo-remsim[master]: bankd, client, server: add -L option to disable log coloring

Attention is currently required from: jtavares. laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-remsim/+/30154 )

Change subject: bankd, client, server: add -L option to disable log coloring ......................................................................

Patch Set 1:

(1 comment)

Patchset:

PS1: traditionally, a lot of osmo-* programs use "-s" aka "--disable-color" for this command line argument, see osmo-{bts,bsc,gbproxy,hlr,hnbgw,hnodeb,mgw,msc,pcap,sgsn,uecups}.

I understand that "-s" is already occupied at least in bankd, but then let's at least keep the long-option in-line with other osmocom programs.