According to ISO/IEC 29500-1:2016(E) 17.6.17), the final <w:sectPr>
must be the last child element of the body element. Also, this is
enforced in schema for CT_Body complex type (Annex A. (normative)
Schemas – W3C XML Schema, A.1 WordprocessingML, page 3866), where
sectPr is a part of <xsd:sequence>, and thus *must* stay at specific
place in sequence, namely being the last element, and be at most one
instance.

However, real-life documents (generated by some third-party software)
have sectPr before other body contents. Unfortunately, MS Word seems
to allow this standards-violating content, and thus encourages
creation of non-standard documents by third-party generators.

This patch doesn't assume that current final (body-level) sectPr is
the last body element, and does not mark current paragraph as last
section's paragraph. Thus, current section (possibly started after
previous paragraph-level sectPr) is continued after final sectPr is
closed.

Change-Id: I8e88288bc6659d77d17986514b3b4fe16a5b45d9
Reviewed-on: https://gerrit.libreoffice.org/40161Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>