Log Message:
Add a new variable BROKEN_READLINE_DETECTION which should be set to
yes/no by a package Makefile, depending on whether the configure
process properly detects the additional libraries needed to link
against -lreadline (typically, you need either "-lreadline -ltermcap",
or "-lreadline -lcurses" to properly link against -lreadline).  If this
variable is set to "yes", then we automatically expand \ 
"-lreadline" into
"-lreadline -l<termcap functions library>".  \ 
BROKEN_READLINE_DETECTION
defaults to "no".

Set BROKEN_READLINE_DETECTION to "yes" in security/heimdal and remove
the custom logic that did the same work.