/* A sequence of null-terminated strings packed next to each other.
The strings are followed by an extra null byte. If TZ_IS_SET,
there must be at least one string and the first string (which is
- actually a TZ environment value value) may be empty. Otherwise
- all strings must be nonempty.
+ actually a TZ environment value) may be empty. Otherwise all
+ strings must be nonempty.
Abbreviations are stored here because otherwise the values of
tm_zone and/or tzname would be dead after changing TZ and calling