[Issue 16291] phobosinit fails to register encodings on individual tests

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16291

--- Comment #10 from Ketmar Dark <ketmar at ketmar.no-ip.org> ---
Created attachment 1603
  --> https://issues.dlang.org/attachment.cgi?id=1603&action=edit
lazy standard codec registration

the attached patch seems to work ok with my system. it registers standard
codecs when user is first trying to use `EncodingScheme.create()`, and it also
exposes `EncodingScheme.registerStandardCodecs()` function, which can be called
to manually register standard codecs if it is necessary in some other module
ctor.

it is safe to call `EncodingScheme.registerStandardCodecs()` multiple times,
and from multiple threads.

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