zonefile changes and long running processes.

[Paul Eggert]

Carlos O'Donell wrote:
> Is this a "flaw" in glibc's support or it simply a pedantic issue
> that systems developers think about and everyone else reboots after
> a tzdata upgrade?

A bit of both, I expect.  In practice, tzdata updates typically affect 
so few files that it's OK to leave servers running even with stale data. 
  Unless you care about the current time in Simferopol, for example, 
it's OK if your server hasn't rebooted since Russia annexed Crimea. 
Conversely, if you care about the current time in Donetsk, quite 
possibly you can't rely on tzdata anyway, so why be pedantic?