This has two patches. First it moves interface.c to libbb (it is

This has two patches.  First it moves interface.c to libbb (it is
support code after all).  It also contains a patch from Larry Doolittle
that removes two instances of "strlen([^)]*) *- *1", un-shadows two
variables, relaxes requirement for a sprintf(3) that returns number of
bytes written, and eliminates a duplicate subroutine.