uncommenting

[xyproto]

If uncommenting and setting a key/value, don't uncomment other mentions of that key.

This config:

#X=opt1
#X=opt2
#X=opt3

And this command:

setconf -u filename X=opt2

Should result in:

#X=opt1
X=opt2
#X=opt3

Not:

X=opt2
X=opt2
X=opt2

Allthough this will also often work out.