documented BCP 47 semantics

Change-Id: Ia2fad8e79833a66bb3e95047fc5885880d6da17c
(cherry picked from commit e3f30efe9f466e776e19210c0e1bccea97e6be49)
handleVendorVariant() strip in case some was injected

Change-Id: I73c42a99671524e9fb186257a9bc943d514958c2
(cherry picked from commit 017a2a368cee1f6f5e7c6e18e65cbbc1a54efe47)
removed declared but undefined LanguageTagImpl::convertFromRtlLocale()

Change-Id: I928fb77181991948216bb18cdfcea0816218a2b9
(cherry picked from commit 5d34cd53e4cb63364cc3a369f7f97fa25d9741cf)
fdo#71350 fix incorrect calculation of Excel function CONFIDENCE.T

Change-Id: I94202bebcc7deded51636f4bf7f203254a31931f
Reviewed-on: https://gerrit.libreoffice.org/6751
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>
(cherry picked from commit d8a023d41ec85538bc0103c063ee722e1de67c2f)
fdo#71722 add Excel 2010 functions

EXPON.DIST, HYPGEOM.DIST, POISSON.DIST, WEIBULL.DIST

Change-Id: Ib9f648739ec0af90cdf2f576c7f548a6acb7b4a6
Reviewed-on: https://gerrit.libreoffice.org/6748
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>
(cherry picked from commit e434c1ce0557454ef4cdd98435c5c0b1d5181bcf)
more tests for new Excel 2010 functions, fdo#70798

Change-Id: If996e57a616adfb21f09463ac305e64c4e2fa4cc
(cherry picked from commit 52999789258aa7cfde8d01ff7e8a03a0f53278db)