Perl libs for OpenSRF ingress tracking

Perl libs for OpenSRF ingress tracking

Ingress is a free-form text value which represents the entry point for
the client into the opensrf network.  The value is passed within opensrf
messages, similar to "locale".  Clients should specify the ingress
before any opensrf communication occurs.

OpenSRF::AppSession->ingress($ingress);

Stock values include the following:

opensrf (default)
srfsh
translator-v1
gateway-v1

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Mike Rylander <mrylander@gmail.com>