Thousands of goroutines kept waiting on sleep as a result of search operation with request timeout.

In the below go routine dump we see 16714 routines are waiting.

`16714 @ 0x844916 0x87168e 0xf49475 0x874801

0x87168d time.Sleep+0x12d /usr/lib/golang/src/runtime/time.go:193

0xf49474 github.com/go-ldap/ldap/v3.(*Conn).processMessages.func2+0x54 /workdir/.build/golib/pkg/mod/github.com/go-ldap/ldap/v3@v3.4.2/conn.go:498`

it seems like those functions will complete when the timeout expires and then the goroutine would go away.
Should we be using a select so they can stop the sleep if the response has already been received