dfsg bit in the package name

[Tomasz Muras <nexor1984@gmail.com>]

Hi Mentors,

Is there any preference/reasoning for using any particular symbol that
joins "dfsg" bit with the package name? I can see that different
packages use a different format, here are some quick stats from packages
in unstable (with the counts):
   1179 +dfsg
   1119 .dfsg
    233 ~dfsg
    201 -dfsg

Should I use "+" or "."? Should that be somehow standardized or
mentioned in the faq? Or do you reckon that it doesn't make any
difference at all and should be left up to maintainers?

cheers,
Tomek