* On some NetBSD systems, the last unset command returns a
  non-zero exit code

* This made the make(1) processes terminate immediately in
  source-env-and-recurse, breaking the build.

Reported by: Thomas Klausner <wiz@NetBSD.org>

We rely on the cell type of those date value outputs when grouping
by date or value range.

Instead of introducing a global variable, use the already existing
saved android_app pointer in lo-bootstrap.c, and just add a function
to rettrieve that.

Reanme osl/detail/android.h back to android_native_app_glue.h, which
is the file from NDK/sources that it is. "android.h" sounded to me too
grand, as if it was some universal Android header. But if we do start
to modify the android_native_app_glue stuff heavily, then it indeed
makes sense to call it something else. Until then, revert also some
whitespace changes to android_native_app_glue.c for it to be as close
as possible to the "upstream" one in the NDK, for clarity.

There is a hardcoded preferred height for the input window that was getting picked up becuase the result of GetTextHeight was just '1' ( due to no font being set up ) We shouldn't use a hardcoded value, we should always use the proper text height e.g. the result of a successfull call to  GetTextHeight() ( the patch makes sure we get a decent result from this call )

Round zoom values beginning with 50 to a multiple of 5, with 100 to one
of 10, with 500 to one of 50 and with 1000 to one of 100.
The step 100 is enforced to have one fixed point.

This reverts commit f7b6cd87.

Missed it while reviewing commit:
f9c09fbb

From now on we'll stick with the 'pivot table' terminology...