License of libsrc/general/mystring.*

[kkremitzki]

Hello, the question of the license for these files came up during review of the Netgen Debian package, could you please clarify?

[kkremitzki]

ng/fonts.hpp is also a bit of a mystery.

[StefanBruens]

Once upon a time, MyString provided SSO (short-string-optimization), but as all current std::string implementations do as well, there is hardly any reason to keep it.