hmm sorry i'll not add a check if server is already open or closed
because if you want change the closed reason:
with my system you can do it directly by using a 2nd 'site close <reason>'
with your system you should reopen 1st your server and close it again to change the closed <reason>
PS ocscript v2.2 soon available with reason cookie support in dzsbot (1.10)
have fun
bounty