lua: Use SC prefix for Lua functions

This commit adds additional Lua API interfaces to bring consistency to
functions such that the `SC` prefix is available consistently across
flow int and flow var functions.

(cherry picked from commit 431018d6f7)

src/detect-lua-extensions.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2013 Open Information Security Foundation
+/* Copyright (C) 2007-2021 Open Information Security Foundation
  *
  * You can copy, redistribute or modify this Program under the terms of
  * the GNU General Public License version 2 as published by the Free
@@ -516,21 +516,39 @@ int LuaRegisterExtensions(lua_State *lua_state)
     lua_pushcfunction(lua_state, LuaGetFlowvar);
     lua_setglobal(lua_state, "ScFlowvarGet");
 
+    lua_pushcfunction(lua_state, LuaGetFlowvar);
+    lua_setglobal(lua_state, "SCFlowvarGet");
+
     lua_pushcfunction(lua_state, LuaSetFlowvar);
     lua_setglobal(lua_state, "ScFlowvarSet");
 
+    lua_pushcfunction(lua_state, LuaSetFlowvar);
+    lua_setglobal(lua_state, "SCFlowvarSet");
+
     lua_pushcfunction(lua_state, LuaGetFlowint);
     lua_setglobal(lua_state, "ScFlowintGet");
 
+    lua_pushcfunction(lua_state, LuaGetFlowint);
+    lua_setglobal(lua_state, "SCFlowintGet");
+
     lua_pushcfunction(lua_state, LuaSetFlowint);
     lua_setglobal(lua_state, "ScFlowintSet");
 
+    lua_pushcfunction(lua_state, LuaSetFlowint);
+    lua_setglobal(lua_state, "SCFlowintSet");
+
     lua_pushcfunction(lua_state, LuaIncrFlowint);
     lua_setglobal(lua_state, "ScFlowintIncr");
 
+    lua_pushcfunction(lua_state, LuaIncrFlowint);
+    lua_setglobal(lua_state, "SCFlowintIncr");
+
     lua_pushcfunction(lua_state, LuaDecrFlowint);
     lua_setglobal(lua_state, "ScFlowintDecr");
 
+    lua_pushcfunction(lua_state, LuaDecrFlowint);
+    lua_setglobal(lua_state, "SCFlowintDecr");
+
     LuaRegisterFunctions(lua_state);
     LuaRegisterHttpFunctions(lua_state);
     LuaRegisterDnsFunctions(lua_state);