Instead of passing a temporary variable current_voice_id to SSML
processing logic and then copying the value to voice_change, pass
voice_change directly. GetVoiceAttributes() both sets voice_change and
retuns CLAUSE_TYPE_VOICE_CHANGE that is used by TranslateClause() for
error checking.

tests/ssml/language-switch.ssml covers the intended behavior of language
switching and will fail when either voice_change or CLAUSE_TYPE_VOICE_CHANGE
is not set correctly.

This approach reduces the amount of nested if statements and doesn't
require the temporary variable int c_next_2.

A test already exists for this case in tests/translate.test

- V_ALPHABET2 is a leftover from 2f8f125.
- langopts assignment is unnecessary since it's not used later in the
function.

It is set but never used.

This adds a corresponding header file for mnemonics.c that was introduced in d5d93be.

The phonSWITCH bug still exists and needs fixing.

qdb - pronunciation improvements

- param2[] is only used to set a second value to LOPT_BRACKET_PAUSE. It is simpler
to have two values in param[] instead. This simplifies the codebase.

- Instead of setting "option bracket X Y" in language files, use
keywords "brackets X" and "bracketsAnnounced Y" instead to follow the
naming convention of other keywords.

- Add missing documentation to docs/voices.md.

There is no code related to it.

It is set but never used.

This is intended for testing command line options such as -k 2, --punct
and so on.

The file is intended for everything mentioned in docs/dictionary.md.

This reverts commit f0c345eb6a.

Fixes #824.

See more at: https://github.com/espeak-ng/espeak-ng/pull/863

translate.h gives two settings to LOPT_CAPS_IN_WORD, but only one of them is actually ever used.

It is enough to have the logic in dictsource/jbo_*.

Thanks to xunsku @ irc.freenode.org

Thanks to xunsku @ irc.freenode.org

This test is related to the next two lojban commits. Thanks to xunsku @ irc.freenode.org