The following functions are not documented in libc.inf file, but are declared
in header files:

in signal.h:
sigaction, sigaddset, sigdelset, sigemptyset, sigfillset, sigismember,
sigpending, sigprocmask, sigsuspend

in stdio.h:
tempnam

in stdlib.h:
initstate, setstate, srand (srand is reported in #124, but for completeness'
sake...)

in time.h:
tzname, tzset (though tzname is not a function)

in unistd.h:
ctermid, getgroups, setgid, setsid, setuid, vfork

tzname[] was added in WIP and will be in v2.03.  The rest are corrected
in v2.02.