V7: Send correct value upon QNH change
NEWS.txt: Added newsline for v7 qnh sync
TrailRenderer: don't import std::min(), std::max()
Added WinPilot-style vario-scaled dots to snail trail options

VARIO_DOTS_AND_LINES is a new option on the Map Display -> Elements
'Expert' menu.  If selected this will cause the snail trail to display
vario-scaled dots (filled circles) with fixed-width lines between the
dots.  The dots and lines use the already-existing vario-scaled widths
and/or colors.
po: update Turkish translation
Merge branch 'v7qnh' of git://git.xcsoar.org/xcsoar/folken/xcsoar
Contest/TraceManager: fix crash when local copy is empty

A regression by commit 70df027d removed the "n_points<num_stages"
check and thus caused a call to back() on an empty vector.  Naturally,
this must crash.  A new check for an empty vector replaces the old
check.
LogFile: remove deprecated alias LogStartUp()
NEWS.txt: prepare version 6.5.4
SDL/Bitmap, Canvas: load mono bitmaps as grayscale

This code has been broken for a long time, ever since we switched to
PNG files and SDL_image for loading unit symbols.  libpng loads mono
images as 8-bit grayscale, and this commit changes the SDL code to
expect exactly that.
LogComputer: update comment
Driver/Volkslogger: increase bulk read timeout to 2s

Reading the flight list sometimes takes that long.
V7: Send correct value upon QNH change
LogComputer: don't stop logging after jump

After the GPS location had jumped once, the last_location attribute
was never again updated, and our IGC logger stoppedd working
(regression by 6fe91062).  The same bug was fixed by 5fdf6ba7, but
this second instance of the bug went unnoticed.

This fixes TRAC tickets #2658, #2735, #2736, #2746, #2751.
LogComputer: allow logging invalid GPS fixes

The previous commit added an extra check that is not necessary.
release v6.5.4
Merge tag 'v6.5.4'
Device/Driver/LX: Add small delay after baud rate change

The first write to the device fails on an IOIO  UART connected device
without the small delay (observed with DroidSoar V2 connected to an
Colibri 1).
Device/Driver/LX: Restore non-bulk baud rate after declaration/flight download
OLCTriangle: Use a branch and bound method for maximizing triangles