protocol/inspircd: Don't send current time in response to IDLE

This will cause InspIRCd to not send RPL_WHOISIDLE (317) to the user doing the whois

Also use uid instead of nick
protocol/inspircd:  Send a VERSION string that is similiar to what we send to other ircds

Use our sid as the source
Merge pull request #323 from attilamolnar/release/7.1+inspircd

protocol/inspircd: Change VERSION string and IDLE reply