Add shdict set_when, safe_set_when, and store_when#171

Open

hnakamur wants to merge 3 commits intoopenresty:masterfrom hnakamur:shdict_set_when

+1,034-306

Commits on Jul 27, 2019

bugfix: ensured the 'pcre_version' symbol is also preserved on Darwin platforms.
thibaultcha
committed

Commits on Aug 3, 2019

Add shdict set_when, safe_set_when, and store_when
hnakamur
committed

Commits on Aug 8, 2019

Add 2 to shdict metatable count for set_when and safe_set_when
hnakamur
committed