Drop support for pre-Unicode versions of Delphi/C++Builder and FreePascal

[rlebeau]

Drop support for pre-2009 versions of Delphi/C++Builder, and pre-3.0 versions of FreePascal. Favor going full Unicode only.

Or at least drop support for AnsiString, and use WideString on versions that do not have UnicodeString available.

[zedxxx]

No, please, don't do it!

[rlebeau]

Sorry, the decision has already been made. Indy 10 will continue to support legacy compilers + IDEs, but Indy 11 is in progress as a maintenance release in the near future (and is currently in the Restructure branch in the SVN and GitHub repositories) and it will drop support for legacy compilers. However, there is currently no ETA on when Indy 11 will actually be released.