Log Message:
Update to 1.2.17. From the changelog:

documentation:

* docs/overview.html: Add Abiword as an example use of --filter, based on patch
  from Frank J Bruzzaniti (fixes#383).

portability:

* Fix "no previous declaration" warning on platforms which don't have
  mkdtemp().

indexers:

* omindex:

  + Fix off-by-one when finding documents to delete which would sometimes cause
    omindex to fail to delete documents from the database when they weren't
    refound during an index update.

  + Decode dates in xlsx files.

  + Ignore extensions 'adm', 'cur', and 'ico' by default.

  + Group-readable files which are owner-readable but not world-readable should
    still get a "readable by owner" term added.  Reported by Emmanuel \ 
Garette.

build system:

* Compress source tarballs with xz instead of gzip.

* configure: Sync compiler warning flag machinery against xapian-core.  The
  changes are special handling for clang, passing -fshow-column where
  supported, and handling for new warning flags in GCC 4.6 and 4.7.