[mysql] updated docs to be clear on what is supported now

Author: ufoot

ddtrace/contrib/mysql/__init__.py

@@ -12,6 +12,8 @@
     cursor.execute("SELECT 6*7 AS the_answer;")
 
 This package works for mysql.connector version 2.1.x.
+Only the default full-Python integration works. The binary C connector,
+provided by _mysql_connector, is not supported yet.
 
 Help on mysql.connector can be found on:
 https://dev.mysql.com/doc/connector-python/en/

ddtrace/contrib/mysql/tracers.py

@@ -38,7 +38,7 @@ def get_traced_mysql_connection(ddtracer, service=DEFAULT_SERVICE, meta=None, tr
     meta -- your custom meta data
     trace_fetch -- set to True if you want fetchall, fetchone,
         fetchmany and fetchwarnings to be traced. By default
-        only execute and executemany are traced.
+        only execute, executemany and callproc are traced.
     """
     if trace_fetch:
         traced_funcs = _TRACEABLE_FUNCS