[Toybox] [PATCH v2] cleanup init.c

[ibid.ag at gmail.com]

-Eradicate (char*) casts for strings.
-Don't panic on failure to write messages.
-Don't panic on failure to fork; sleep an extra second instead.
-s/defualt/default/g
-Inline a couple functions called once.
(Don't inline inittab_parsing because it is too large).

--

This is more-or-less the same patch I sent, updated to apply to master.
(In future, feel free to ask me to update patches I send when
they don't apply.)

I'll send the part that removes VT_OPENQRY later, since it's a feature
change rather than a bugfix (trail of breadcrumbs and all that).

HTH,
Isaac Dunham

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