Translations:Upgrading from 5.x/21/en

Running a mixed U5-U6 network
There are some consequences of running a network where some are running UnrealIRCd 5 and some other server(s) are on UnrealIRCd 6. In most cases they are minor and acceptable for a short period of time (say, a few weeks or a few months) until the entire network is on UnrealIRCd 6.