Merge r291073:

Merge r291073:
  If a NIS server has long entries on its database that is bigger than
  1024 specified on YPMAXRECORD the ypmatch can get in an infinite retry
  loop when is requesting the information from the NIS server.

  The ypmatch(1) will return an error until the command receives an
  kill(1).

  To avoid this problem, we check the MAX_RETRIES that is by default set
  to 20 and avoid get in infinet loop at the client side.

git-svn-id: svn://svn.freebsd.org/base/stable/9@293804 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f