redfish/updateservice: Add struct field MultipartHTTPPushURI (#166)
redfish/updateservice: Add struct field MultipartHTTPPushURI (#166)

A service may support the MultipartHttpPushUri property within the
UpdateService resource.
A client can perform an HTTP or HTTPS POST request on the URI specified by this
property to initiate a push-based update.

ref: https://www.dmtf.org/sites/default/files/standards/documents/DSP0266_1.15.0.pdf
stmcginnis/gofish,stmcginnis/gofish,stmcginnis/gofish