[fpc-pascal] FPC 3: disabling automatic AnsiString codepage conversion

[tobiasgiesen at gmail.com]

> Your question was not about Lazarus but maybe you should read this:
>   http://wiki.freepascal.org/Better_Unicode_Support_in_Lazarus

Very interesting, but apparently there is some wrong info.

It says "On Linux and Mac OS X UTF-8 is typically the system codepage, so the RTL uses 
here by default CP_UTF8."

Not on my Mac. DefaultSystemCodePage is 20127 before I set it to 65001.

Should I fix this bit on the documentation page?

Apparently the LCL assumes that FCL sets it to UTF-8, but it does not.

I think the LCL should explicitly set it to CP_UTF8 on Mac and Linux.

Cheers,
Tobias