proxy: add r:has_flag(), fix r:token() length

Add mcp.request function for quick checking if a flag exists in a
request string.

Also updates internal code for checking the length of a token to use the
endcap properly, and uses that for the r:token(n) requets as well, which
fixes a subtle bug of the token length being too long.

1 files changed, 1 insertions, 0 deletions

diff --git a/proxy.h b/proxy.h
index 1ff521d..fd7ad99 100644
--- a/proxy.h
+++ b/proxy.h
@@ -457,6 +457,7 @@ int mcplib_request_ltrimkey(lua_State *L);
 int mcplib_request_rtrimkey(lua_State *L);
 int mcplib_request_token(lua_State *L);
 int mcplib_request_ntokens(lua_State *L);
+int mcplib_request_has_flag(lua_State *L);
 int mcplib_request_gc(lua_State *L);
 
 int mcplib_open_dist_jump_hash(lua_State *L);