added option to change portnumber|servicename
Merge pull request #8 from ThorstenS-linux/ssl-expiry-date-patch

added option to change portnumber|servicename
  Minor updates.
  That time has come - a binary tool.

  Added `ipaddr` source code, which is written in C.  It can
 be compiled with `make build`.
  Updated header to refer to preferred name.
   Updated header.
  Updated the use of 'w'.

  Some hosts don't like the long-form of arguments, so use
 "w -h" instead of "w --no-header".
  Updated to hide warnings about locks.
  Updated our build/clean target.

  This now correctly rebuilds `ipaddr` from `ipaddr.c` if it
 has changed.
  Ensure hostnames are unqualified.
  Change the timeout from 1 second to 5 seconds.

  Allow this to be overridden via -t NN
  Hide errors from netcat.
Merge remote-tracking branch 'upstream/master'