Distribute aclocal.m4, install-sh, config.guess, and config.sub
to applications at build time instead of having multiple identical
copies committed in the repository.

* siri/ct_netconfc/subsystem-timeout/OTP-12334:
  [ct_netconfc] Handle timeout failure in ssh

ssh_connection:subsystem/4 can return success | failure |
{error,timeout}. The latter was not handled by ct_netconfc.erl. This
is now corrected.

This test case simulates that the server spontaneously sends data. By
changing ct_telnet:send to ct_telnet_client:send_data this simulations
makes more sense - since client's buffers are not flushed.

Also removed the newline at the end of "echo_no_prompt" command. Since
newline is added automatically, the explicit newline at the end of the
command causes a prompt to be sent which is not expected.

ct_telnet_own_server_SUITE:large_string sometimes fail in the last
attempt - where get_data is used to fetch smaller chunks - probably
because one get_data message towards ct_telnet_client returns without
having received any new data.

This commit adds timestamps to debug printouts and improves the
logging.

This is the telnet server used when testing ct_telnet and friends. The
telnet client itself is not changed.

This is for stabilizing test cases.

The telnet client used to send an extra newline after the
password. This caused an extra prompt to be sent back from the
server. Some test cases failed every now and then due to this - since
the second promt was confusing. This is now corrected, i.e. the client
does no longer send an extra newline after the password.

ct_telnet by default adds a newline to all command strings before
sending to the telnet server. In some situations this is not desired,
for example when sending telnet command sequences (prefixed with the
Interprete As Command, IAC, character). In such cases, the new option
can be used. Example - send an Are Your There (AYT) sequence:

ct_telnet:send(Connection, [255,246], [{newline,false}]).