Is statfs() still supposed to be in libc?

[Jason Bacon <outpaddling%yahoo.com@localhost>]

While upgrading ncbi-blast+, I looked deeper into a workaround for a 
statfs() issue.  The blast configure script incorrectly determines that 
statfs() is supported on NetBSD, when in reality is was deprecated and 
removed from the API a long time ago, superseded by statvfs().

However, the statfs() function is still in libc and this is all the 
configure script checks for.

Is statfs() still needed internally, or should it be removed from libc 
at this point?