bumped version to 1.17.8.2.

tests: fixed tests to reflect component version bumps.

upgraded lua-resty-core to 0.1.18rc4.

win32/win64: upgraded pcre to 8.44.

bumped version to 1.15.8.1.

bugfix: win32/win64: the error log buffer size was merely 2048 bytes …

…(now updated to 4096 bytes).

applied the win32_max_err_str patch for the nginx core.

bugfix: added an openssl patch to fix the parallel build regression i…

…n openssl 1.1.0j.

restydoc: updated the bundled version of the LuaJIT docs to the latest.

formal release 1.13.6.1.