nginx: Fix of 5 CVEs

CVE-2017-7529: fix integer overflow in range filter - CVE-2018-16843: fix excessive memory consumption in HTTP/2 - CVE-2018-16844: fix excessive CPU usage in HTTP/2 - CVE-2019-9511: fix excessive memory growth via HTTP/2 DATA frame manipulation - CVE-2019-9513: fix excessive CPU usage via HTTP/2...