[IRCServices] LogonNews And Opernews Feature.

[Dionisios K.]

Services sends the first 3 logon/opernews to users to prevent flood
This is correct. BUT
If i want an to add another opernew or a logonnew  to be showen on connect i 
should delete another.

A new command should be added.. so none message need to be deleted but just 
be hidden :-)

/OS OPERNEWS HIDE / SHOW #num
/OS LOGONNEWS HIDE / SHOW #num

With this none message is lost (deleted) and if i want to i can enable to be 
shown and hide another one;-)