[develop2] Discuss special chars +-. in package names

[memsharded]

I think that as a workaround it might be ok, but the general policy should be to avoid special symbols completely. Because there is a failure mode, if one package is called hello+, and another is hello-, they will conflict and overwrite each other.

Question to discuss with the team, should we further restrict the Conan 2.0 current validation_pattern = re.compile(r"^[a-z0-9_][a-z0-9_+.-]{1,100}$") validation pattern for the package names?

Originally posted by @memsharded in #11826 (review)

[memsharded]

Lets add a warning at export time, that warns when .-+ is used in other fields rather than version field.

[memsharded]

Closed by #12053, will be in beta.3