cmd-save: add --smaller option.
cmd-save: add --smaller option.

This makes it only back up files smaller than the given size.  bup can
handle big files, but you might want to do quicker incremental backups and
skip bigger files except once a day, or something.

It's also handy for testing.

tjanez/bup,jbaber/bup,tjanez/bup,apenwarr/bup,mhoeher/bup,apenwarr/bup,mhoeher/bup,pombredanne/bup,tjanez/bup,tjanez/bup,apenwarr/bup,jbaber/bup,gevaerts/bup,mhoeher/bup,tjanez/bup,jbaber/bup,jbaber/bup,ToxicFrog/bup,jbaber/bup,gevaerts/bup,apenwarr/bup,pombredanne/bup,pombredanne/bup,mhoeher/bup,ToxicFrog/bup,pombredanne/bup,mhoeher/bup,pombredanne/bup,ToxicFrog/bup,gevaerts/bup,gevaerts/bup,jbaber/bup,pombredanne/bup,mhoeher/bup,ToxicFrog/bup,tjanez/bup,ToxicFrog/bup,gevaerts/bup