[PATCH 2/2] newlib/libc/time/tzset_r.c(_tzset_unlocked_r): POSIX angle bracket <> support

[Brian Inglis]

define POSIX specified minimum TZ abbr size 3 TZNAME_MIN
use limits.h TZNAME_MAX, _POSIX_TZNAME_MAX, unistd.h sysconf(_SC_TZNAME_MAX)
issue error if no symbols defined (document fallback value in case required)
allow POSIX angle bracket < > quoted signed alphanumeric tz abbr e.g. <MESZ+0330>
allow POSIX unquoted alphabetic tz abbr e.g. MESZ
apply same changes for DST tz abbr
---
 newlib/libc/time/tzset_r.c | 74 ++++++++++++++++++++++++++++++++------
 1 file changed, 64 insertions(+), 10 deletions(-)

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