Make callproc take a `str` for procname instead of `bytes`, for Python 3 compatibility
Make callproc take a `str` for procname instead of `bytes`, for Python 3
compatibility

Aloomaio/pymssql,JimDennis/pymssql,ramiro/pymssql,zerolugithub/pymssql,pymssql/pymssql,Aloomaio/pymssql,bladams/pymssql,JimDennis/pymssql,bladams/pymssql,bladams/pymssql,JimDennis/pymssql,klothe/pymssql,zerolugithub/pymssql,klothe/pymssql,zerolugithub/pymssql,ramiro/pymssql,ramiro/pymssql,Aloomaio/pymssql,klothe/pymssql,pymssql/pymssql