Trusted connection option causes -99999 on IBM i

[NattyNarwhal]

$options['trustedcontext'] = DB2_TRUSTED_CONTEXT_ENABLE; // $options passed to db2_connect

Is enough to cause a message like:

PHP Warning:  db2_connect(): Error occurred in SQL Call Level Interface SQLCODE=-99999

The trusted connection stuff is inert on IBM i (IIRC, it's not supported by SQL/CLI on it). It should be doing nothing, rather than mucking things up.

Likely resolution: just #ifdef it out. A lot of trusted context stuff is already this way, so it's curious it's not here.