More error checking on tz files; Refs #8391

git-svn-id: http://svn.boost.org/svn/boost/trunk@84645 b8fc166d-592f-0410-95f2-cb63ce0dd405
Changed attribute name ordering predicate so that non-typical char_traits::compare implementations don't issue buffer overruns.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84646 b8fc166d-592f-0410-95f2-cb63ce0dd405
Removed extraneous return-unreachable introduced in [84645]

git-svn-id: http://svn.boost.org/svn/boost/trunk@84647 b8fc166d-592f-0410-95f2-cb63ce0dd405
Fixed some mixed singular/plural bits

git-svn-id: http://svn.boost.org/svn/boost/trunk@84648 b8fc166d-592f-0410-95f2-cb63ce0dd405
[geometry] Add index::rtree visitor collecting basic tree statistics.

git-svn-id: http://svn.boost.org/svn/boost/trunk@84649 b8fc166d-592f-0410-95f2-cb63ce0dd405