Ssl fixes for ENGINE and UI includes

[karlp]

Not sure if the ui.h include is part of engine support or not, but it needs to be included for the openwrt buildroot at least.

The ENGINE=no support is just something quick to get me to compile again. I may have not taken the preferred paths of warning that things might not be available.

I'm completely ok with simply requiring ENGINE support. OpenWrt is defaulting to engine ON now, I've only extended the patching as support for building without engine support was already in the codebase.

• [n/a ] If you are contributing a new feature, is your work based off the develop branch?
• [no (fixes branch isn't uptodate) ] If you are contributing a bugfix, is your work based off the fixes branch?
• [x ] Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully run make test with your changes locally?
• [x ] Have you signed the Eclipse Contributor Agreement, using the same email address as you used in your commits?
• [x ] Do each of your commits have a "Signed-off-by" line, with the correct email address? Use "git commit -s" to generate this line for you.

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[ralight]

This is coming up as you not having signed the ECA, maybe it expired?

[karlp]

expired? wtf. I'll try and make them happy again.

[karlp]

Yep, was expired. have re-signed. Don't understand the travis failures though