v3. Spin off nick-popup business to separate patch. Fix existing bug
concerning truncated transmission of KICK "reason". Change "strategy"
function type from operating on strings to normalized RGB triplets. Fix
perceived bug in invert strategy and have it consult contrast knob. Add
new saturation strategy and knob. Redo front matter for anticipated
inclusion of other authors.

                                 . . .

For anyone following this bug, there's been some movement regarding the
possible official incorporation (or adaptation) of erc-hl-nicks by David
Leatherman. How exactly that's to occur will be up for discussion in due
course. These developments do mean that this feature may not be ready in
time for ERC 5.6, so I may end up renaming this bug at some point (just
a heads up). Thanks.