Net::LDAP::ConnectionError swallows Errno::ETIMEDOUT

[davispuh]

Currently if SSL timeout occurs then Errno::ETIMEDOUT will be raised in wrap_with_ssl but later in open_connection it will be caught and created as Net::LDAP::ConnectionError.
But Net::LDAP::ConnectionError will lose all information about it and it can only be caught as Net::LDAP::Error which covers pretty much everything.

So currently to retry temporary issues (ie. timeout) you have to compare Net::LDAP::Error message with "Connection timed out - OpenSSL connection read timeout" for this.

I think Net::LDAP::ConnectionError should do same for Errno::ETIMEDOUT as it does for Errno::ECONNREFUSED

[HarlemSquirrel]

It doesn't look like Errno::ETIMEDOUT is one of the rescued errors here.

ruby-net-ldap/lib/net/ldap/connection.rb

Lines 64 to 65 in e25b881

	rescue Net::LDAP::Error, SocketError, SystemCallError,
	OpenSSL::SSL::SSLError => e

[davispuh]

SystemCallError is base class for Errno exceptions that's why they get rescued here.