pkgtools/pkg_rolling-replace: Update to 0.24.14

Update pass on man page:

  prune no-longer-working bbn.com email addresses and replace with
  alternate attribution

  Rewrite bug section about likely failures with many packages; this
  is not a pkg_rr bug.

  Add bug section about PKGNAME vs PKGPATH.  This is a pkg_rr bug :-(

  Rewrite -r flag to be less confusing.

  Rewrite -k flag to align caution to reality and explain why one
  would want to use it.

  Misc wording cleanups.

(gdt)