[Merge] ~zhsj/ubuntu/+source/burp:bug2046149 into ubuntu/+source/burp:ubuntu/devel

[Shengjing Zhu]

As explained in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1057880 the zlib version check has been removed by upstream.

PPA for testing https://bugs.launchpad.net/ubuntu/+source/burp/+bug/2046149
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https://code.launchpad.net/~zhsj/ubuntu/+source/burp/+git/burp/+merge/457222
Your team Ubuntu Sponsors is requested to review the proposed merge of ~zhsj/ubuntu/+source/burp:bug2046149 into ubuntu/+source/burp:ubuntu/devel.