feature: ship a luacheck configuration for this project

spacewander · spacewander · commit 7dd8ec7db789 · 2018-07-21T11:14:02.000+08:00
diff --git a/.gitignore b/.gitignore
@@ -3,3 +3,4 @@ t/servroot
 librestybaseencoding.so
 modp_b85_gen
 bm.lua
+.luacheckcache
diff --git a/.luacheckrc b/.luacheckrc
@@ -0,0 +1,6 @@
+cache = true
+ignore = {
+    '_',
+}
+std = 'ngx_lua'
+redefined = false
