This reverts commit 8021528f5e.

Failing on CI/CD.

StatusCreateTerminatedMsg.

This is not covered by current tests.

LoadConfig() should be refactored to support both voice and language options set
in LoadVoice() and LoadLanguageOptions().

This will make it easier to set a default voice other than
English. This is important for cases when a language will fall back to
the default voice.

Some references to L('e', 'n') still need to be changed.

With the previous calculation, it was possible for the buffer to be
a byte or two too small to hold all of the data.

this_ph_data, N_WAV_BUF, option.device, harm_sqrt_n,  max_hval, next_pause

Going through files in src/libespeak-ng/, include-what-you-use removed a
few unnecessary includes and included explanations on why a certain
header should be included. This makes tracking globals and dependencies easier.

Running the codebase through IWYU should be repeated after each major
code restIncludes to standard c library weren't checked to avoid
breaking builds with other platforms.

See https://github.com/include-what-you-use/include-what-you-use

Unsigned char *out_start is a global only used in speech.c.

When notably the audio card is busy, we should report the issue to the
application, but still permit the application to retry submitting text
to synth, and eventually succeed to open it.

This change simply fixes the update of the out_samplerate variable to track
whether audio is open, and if not when text is submitted by the application,
try again to open it.