WHOIS: Show the given nick in ERR_NOSUCHNICK even if it starts with a digit. This is safe because the last parameter is a nick and never a UID. (The first parameter in a server-server two-param whois is a UID/SID.)
This cannot be overridden with operspy.
+ branches/release-2.1 -> 2.2 base + 3.0 -> branches/cxxconversion + backport some immediate 3.0 functionality for 2.2 + other stuff