LDAP timeouts during failure conditions

[Alan DeKok]

Phil Mayers wrote:
> https://github.com/philmayers/freeradius-server/commit/58e545bd183029da9cdb1e591cd38ca208f55f87
> 
> 
> ...this is *not* a connection pool, but an example of one way to solve
> the problem; spawn a child thread to create connections.

  See git "master".  There is now src/main/connection.c, which handles
pools of connections.  It *should* work for you.

  Alan DeKok.