Update php5 to v5.6.30

[joanhey]

v5.5.x has reached the end of life 9 months ago
Work in progress

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[NateBrady23]

@joanhey Mind if I steal you if you have a moment? You're currently doing the most work in PHP. Do you happen to know how to disable gzip encoding for the php frameworks listed in #2646? It doesn't look like it's being done at the nginx level

[joanhey]

I will check it @nbrady-techempower

[joanhey]

Sorry for the merge

[joanhey]

mmm, closed the pull request to remove work to travis, but it's the same