[Libreoffice] [REVIEW][3-{4, 5}] fdo#45446 fdo#45449 fdo#45450 fdo#45534: various invalid ODF problems

[Michael Stahl]

hi all,

these fixes for invalid ODF produced by LO should go into
libreoffice-3-4 and libreoffice-3-5:

fdo#45449
0b7bba10208d198471cbdb56c2007e5cdb00a6ac

fdo#45450
790365e79d28e2c2a41140707ac126dbf6966e38

fdo#45534
6c15b856242127ddca766da700002489ba287e21

this one should go into -3-5, i'm not sure if we want to have it in -3-4
as well, as it does create a minor new backward incompatibility, and i'm
not sure if that is appropriate at this point in 3.4 lifecycle:

e2bc0c04ba0c33e02f1842013041f26ccb2de77d

>     fdo#45446: officecfg: turn off SaveBackwardCompatibleODF
>     
>     As detailed in the bug, this option is the reason why LO writes several
>     elements and attributes that are not valid in ODF; the corresponding
>     bugs in the import filters are all fixed in OOo 2.4 or earlier,
>     so there is no reason to risk interoperability problems with other ODF
>     impolementations for this any more.