Log Message:
Update to 2.40.102. Includes ocaml-4 compat patches (which were already
in pkgsrc).

 Added BelowPath patterns, that match a path as well as all paths
 below (convenient to use with nodeletion,update,creationpartial
 preferences)

 Added a fat preference that makes Unison use the right options
 when one of the replica is on a FAT filesystem.

 Allow prefer/force=newer even when not synchronizing modification
 times. (The reconciler will not be aware of the modification time
 of unchanged files, so the synchronization choices of Unison can
 be different from when times=true, but the behavior remains sane:
 changed files with the most recent modification time will be
 propagated.)

 Minor fixes and improvements:

 Compare filenames up to decomposition in case sensitive mode when
 one host is running MacOSX and the unicode preference is set to
 true.

 Rsync: somewhat faster compressor

 Make Unicode the default on all architectures (it was only the
 default when a Mac OS X or Windows machine was involved).