Fix bug 493236. We explicitly depend on Perl if we need it.
Fix bug 492338: Version bump.
Fix bug 490048: Add RDEPEND on dev-libs/libpcre and dev-libs/libxml2
Fix bug 483074: Convert to python-r1
Fix bug 466114: Add explicit LIBS for sqlite
Fix bug 489224: Add slot operator to poppler and perl dependencies
Fix bug 482888: Okay, maybe I fixed, maybe I haven't. At any rate, minimum version is set to something confirmed as a fix.
Option no longer used.
Sort the option lines.
Merge branch 'gdal-fixes'

Fix bug 493236: Depend on Perl conditionally. Thanks Nikoli.
Fix bug 492338: Version bump. Thanks Stephan Litterst.
Fix bug 483074: Convert to python-r1 to support multiple Pythons. Thanks
                Ian Stakenvicius.
Fix bug 466114: Append -lisqlite3 to LIBS. Thanks cmuelle8.
Fix bug 482888: Modify poppler dependency to have a minimum
                version (>=0.24.3).
Fix bug 490048: Add dev-libs/libpcre and dev-libs/libxml2 to RDEPEND
Fix bug 489224: Add sub-slot operator to trigger rebuild when poppler or
                Perl is updated. Thanks Nikoli.
Fix bug 490046: Resolved by sci-libs/gdal version bump.