ref/_mssql.rst: Fix some typos; clean up grammar.
ref/_mssql.rst: Fix some typos; clean up grammar.

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