* LibreOffice: fix build on secondary arch. Minor changes. (#2661)
* Depend on boost >= 1.65.0 as suggested by @kallisti5 in #2657.
* Add missing devel:liboost_* to BUILD_REQUIRES.
* Do not use --with-distro=LibreOfficeHaiku but, instead, copy
upstream's distro-configs/LibreOfficeHaiku.conf to the recipe.
* Add --with-system-libepubgen to config options.
* LibreOffice: use our own vendor string.
* LibreOffice: some alphabetical sorting.
BTW, there was (only) one duplicate switch: --with-system-clucene