OpenSSL 1.1.0i/1.0.2p

Merge pull request ruslo#1476 from alexeiz/master

 Update 'ZMQPP' to v4.1.2-p3

Docs: Add HUNTER_GIT_SELF_IGNORE_UNTRACKED

Boost 1.68.0-p0

Add 'tcl' package (ruslo#1515)

Merge pull request ruslo#1513 from olliwang/android

Fix the issue that libxml2 failed to build with NDK r18.

Merge pull request ruslo#1511 from olliwang/android

Fix “—sysroot” for Android Studio.

Merge pull request ruslo#1512 from epvbergen/bugfix.zlib

ZLIB: added zlib.pc to PACKAGE_UNRELOCATABLE_TEXT_FILES for glib et al.

Fix CURL Android (add HAVE_POLL_FINE_EXITCODE__TRYRUN_OUTPUT)

Merge pull request ruslo#1510 from dvirtz/pr.update.type_safe

update type_safe to v0.2-p1