[njs] Added njs_vm_array_alloc() and njs_vm_array_push() public API.

details: https://hg.nginx.org/njs/rev/5e136f9a5954 branches: changeset: 1196:5e136f9a5954 user: Dmitry Volyntsev date: Wed Oct 23 14:42:38 2019 +0300 description: Added njs_vm_array_alloc() and njs_vm_array_push() public API. diffstat: src/njs.h| 4 src/njs_vm.c | 39 +

[njs] Refactoring iteration over external objects.

details: https://hg.nginx.org/njs/rev/9e327cd3a33e branches: changeset: 1197:9e327cd3a33e user: Dmitry Volyntsev date: Wed Oct 23 14:42:38 2019 +0300 description: Refactoring iteration over external objects. Previously, two callbacks were required to support array-like iteration for