Test hexdump

<a href='#crh-start'></a><a href='#crh-data-%7B%22processed%22%3A%20%5B%22https%3A//github.com/cesanta/net_skeleton/pull/50%23issuecomment-61476077%22%2C%20%22https%3A//github.com/cesanta/net_skeleton/pull/50%23issuecomment-61484425%22%2C%20%22https%3A//github.com/cesanta/net_skeleton/pull/50%23issuecomment-61484551%22%5D%2C%20%22comments%22%3A%20%7B%22General%20Comment%22%3A%20%7B%22html_url%22%3A%20%22https%3A//github.com/cesanta/net_skeleton/pull/50%23issuecomment-61476077%22%2C%20%22comments%22%3A%20%5B%7B%22body%22%3A%20%22Fails%20on%20linux%20machine%20-%20could%20you%20take%20a%20look%20pls%3F%22%2C%20%22created_at%22%3A%20%222014-11-03T13%3A22%3A52Z%22%2C%20%22user%22%3A%20%7B%22avatar_url%22%3A%20%22https%3A//avatars.githubusercontent.com/u/601816%3Fv%3D2%22%2C%20%22html_url%22%3A%20%22https%3A//github.com/cpq%22%7D%7D%2C%20%7B%22body%22%3A%20%22that%20was%20fun.%20beefed%20up%22%2C%20%22created_at%22%3A%20%222014-11-03T14%3A26%3A22Z%22%2C%20%22user%22%3A%20%7B%22avatar_url%22%3A%20%22https%3A//avatars.githubusercontent.com/u/52673%3Fv%3D2%22%2C%20%22html_url%22%3A%20%22https%3A//github.com/mmikulicic%22%7D%7D%2C%20%7B%22body%22%3A%20%22%3A%2B1%3A%22%2C%20%22created_at%22%3A%20%222014-11-03T14%3A26%3A59Z%22%2C%20%22user%22%3A%20%7B%22avatar_url%22%3A%20%22https%3A//avatars.githubusercontent.com/u/52673%3Fv%3D2%22%2C%20%22html_url%22%3A%20%22https%3A//github.com/mmikulicic%22%7D%7D%5D%2C%20%22title%22%3A%20%22General%20Comment%22%7D%7D%7D'></a>
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- [x] <a href='#crh-comment-General Comment'></a> <img src='http://www.codereviewhub.com/site/github-completed.png' height=16 width=60>&nbsp;<b><a href='https://github.com/cesanta/net_skeleton/pull/50#issuecomment-61476077'>General Comment</a></b>
- <a href='https://github.com/cpq'><img border=0 src='https://avatars.githubusercontent.com/u/601816?v=2' height=16 width=16'></a> Fails on linux machine - could you take a look pls?
- <a href='https://github.com/mmikulicic'><img border=0 src='https://avatars.githubusercontent.com/u/52673?v=2' height=16 width=16'></a> that was fun. beefed up


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