Update configuration and Input.fsx

Author: cmeeren

docs/content/configuration and Input.fsx

@@ -328,7 +328,7 @@ type AdventureWorks2012 = SqlProgrammabilityProvider<connStr>
     
 By default all input parameters of `AsyncExecute/Execute` generated by `SqlCommandProvider<...>` are mandatory. 
 But there are rare cases when you prefer to handle NULL input values inside T-SQL script. 
-`AllParametersOptional` set to true makes all parameters (guess what) optional.
+`AllParametersOptional` set to true makes all parameters `Option`-wrapped.
 *)
 
 type IncrBy = SqlCommandProvider<"SELECT @x + ISNULL(CAST(@y AS INT), 1) ",