…ed as allowed failures

we don't repeat three copies of it freezing for 10 minutes

Add travis tests for various ruby versions, with 1.8.7 and jruby marked ...

with rvmsudo);
Drop ruby 1.8.7 test;
Fix ping of 192.168.0.1 to use 127.0.0.1 instead;
Move handling of EXCLUDE_ICMP_TEST to the same place as other excludes;

Add icmp tests to travis, drop ruby 1.8.7, note known issues discovered in testing

Using Timeout.timeout with Open3 is not an option with Ruby > 1.9.3
(see https://bugs.ruby-lang.org/issues/5487). Implemented a workaround
based on the code at https://gist.github.com/lpar/1032297

This update should trigger a Travis CI build on different Rubies.

Fixed timeouts in Net::Ping::External

Merge back changes from djberg96

This typo had the effect of setting the expected
ping duration to 5.5s instead of 1.5s. Since in Windows
the defaul ping timeout is 4s, the test always passed.

The -w option of ping on Windows has the same effect
of an external timeout.

Fix a typo in the unit test for Net::Ping::External and change the implementation for Windows

coSimplify and expand tests, adding tests for:
* timeout conditions
* unreachable hosts and routes
* open and unused ports

Added test/setup_ubuntu.bash to setup unreachable host, route,
and confirm we can still use telstra.com as a black hole
for pings and tests for ports 7, 22 and 1001

Refactored tests to line up with existing example in external

Add extra rvm versions;
Add IGNORE_HTTP_PING_DOES_NOT_WAITS_FOR_RESPONSE_BUG and
IGNORE_HTTP_PING_DOES_NOT_TIMEOUT_BUG to test those bugs with
failure allowed;

Reorganise .travis.yml to make intent clearer

Speed up timeout tests

Give more details on failing tests

…ble host (using iptables doesn't work for host unreachable);

Don't enforce that icmp pings have to wait if they discover network unreachable early;

Conflicts: (resolved in favour of upstream changes):
	README
	lib/net/ping/external.rb
	test/test_net_ping_external.rb

…le_tests

Conflicts:
	test/test_net_ping_external.rb