style: use 4-space indentation in clienthello.lua.

Author: xuruidong

lib/ngx/ssl/clienthello.lua

@@ -193,12 +193,12 @@ end
 
 
 local prot_map  = {
-  ["SSLv2"] = 0x0002,
-  ["SSLv3"] = 0x0004,
-  ["TLSv1"] = 0x0008,
-  ["TLSv1.1"] = 0x0010,
-  ["TLSv1.2"] = 0x0020,
-  ["TLSv1.3"] = 0x0040
+    ["SSLv2"] = 0x0002,
+    ["SSLv3"] = 0x0004,
+    ["TLSv1"] = 0x0008,
+    ["TLSv1.1"] = 0x0010,
+    ["TLSv1.2"] = 0x0020,
+    ["TLSv1.3"] = 0x0040
 }