Fix handling of duplicate copy for local copies.

Do not use the imgid into the local-copy cache filename to have a single
original picture for all duplicate. This can save disk spaces.

Delete the local cache copy only when there is no more images (duplicate)
referencing it. Note that we also now properly delete cached XMP for
duplicate.

Note that the old scheme is kept for upward compatibility. So as long as
there is a local copy with the old naming scheme it will be used.
Merge pull request #704 from darktable-org/fix-dup-local-copy

Fix handling of duplicate copy for local copies.
Merge pull request #715 from cyr123/d750_rawfmts

Fix D750 12-bit RAW format support (correct black/white level)
wb_presets: Sony RX100M3 (thanks to Juliett09)
Updated Dutch translation
Merge pull request #718 from MRIG/master

Updated Dutch translation
Update French translation.
Updated Catalan translation
opencl: fix interpolation border issues (double-lines)
opencl: partly revert last commit in lens distort kernels
Merge pull request #719 from josepvm/master

Updated Catalan translation (44% translation done, work in progress)
Don't use translated lens names internally

This fixes #10178. Please test if it breaks something else.
usermanual: some minor additions
Small refactoring of date utility function

Having that in the .c file instead of inline in .h makes recompiling
faster when changed.
Added Sony A7R WB presets.
adobe_coeff: FUJIFILM HS10 HS11 support
adobe_coeff: FUJIFILM HS20EXR support
rawspeed: FUJIFILM HS20EXR support
adobe_coeff: FUJIFILM HS30EXR support
rawspeed: FUJIFILM HS30EXR support