release v2.8.0

What's Changed

• Update README.md by @alfredh in #503
• thread: fix win32 thrd_create return values by @sreimers in #506
• cmake: bump min. version 3.10 by @sreimers in #504
• cmake: add USE_JBUF option by @alfredh in #507
• http/https requests with large body by @fAuernigg in #485
• http/client: fix possible null pointer dereference by @sreimers in #509
• ci: test choco install no-progress by @alfredh in #510
• bitv: remove deprecated module by @alfredh in #513
• types,fmt: use re_restrict by @sreimers in #514
• refer out of dialog by @cspiel1 in #508
• UPDATE bugfix by @maximilianfridrich in #516
• sip/auth: fix mem_zalloc return check by @sreimers in #518
• Update media fixes by @cspiel1 in #515
• dns, http: add dnsc_getaddrinfo_enabled. prevent reset of getaddrinfo enabled by @fAuernigg in #519
• rtp: Improve media synchronization by @Lastique in #418
• conf: check if returned size is larger than buffer by @alfredh in #523
• udp: remove very old iOS hack by @alfredh in #524
• tcp: remove very old iOS hack by @alfredh in #525
• Use CMake for debian packages by @sreimers in #522
• crc32: add re wrapper by @alfredh in #526
• ci: convert valgrind to cmake by @alfredh in #529
• ci: convert ssl build to cmake by @alfredh in #530
• ci: convert fedora to cmake by @alfredh in #531
• ci: convert coverage to cmake by @alfredh in #532
• ci: migrate to cmake by @alfredh in #533
• cmake: add LINKLIBS and make backtrace and zlib optional by @sreimers in #534
• C99 compatibility by @sreimers in #536
• pcp: fix cppcheck warning by @alfredh in #540
• fmt/print: fix cppcheck overflow warning by @sreimers in #542
• tls: remove SHA1 fingerprint (deprecated) by @alfredh in #527
• send DTMF via hidden call by @cspiel1 in #537
• sipreg: avoid sending un-REGISTER periodically by @cspiel1 in #543
• cmake,mk: bump the tentative next release with pre-release identifier by @sreimers in #546
• sipsess/update: Add Contact header to UPDATE by @maximilianfridrich in #545
• cmake: fix shared API soversion (aligned with make) by @sreimers in #549
• release v2.8.0 by @cspiel1 in #551

Full Changelog: v2.7.0...v2.8.0