This method returns `true` if the time instance was created with accurate
timezone information. Ultimately, only those times parsed from binary
DOS format are missing accurate timezone information, but we need this
flag because ruby `Time` objects (from which `DOSTime` is decended) always
have a timezone set (usually whatever is local at the time).
Workaround jruby/jruby#6668 until fix is released.
Version 9.2.18.0 is hopefully the version that will fix this, but we can
adjust the version accordingly if not.
Having a specific 'does this instance equal another instance' method is
kind of annoying and breaks a number of things. Most obviously it breaks
comparing to `nil`: `nil.dos_equals(other)` will fail where
`nil == other` does not.
So this commit overrides `<=>` in `Zip::DOSTime` and deprecates
`dos_equals`.
Robert Haines
Takumasa Ochi
Pavel Lobashov
Vít Ondruch
Pavel.Lobashov
Alexander Simonov
James Sanders
Jean Boussier