VerifiedHTTPSConnection inherits from HTTPSConnection so 'port' should be
an optional argument. If not present it will be set by HTTPSConnection
in the usual way: by parsing the host string (eg 'localhost:8443')
or setting to the default of '443'.
Addresses bug 1102944.
Change-Id: I2c2cb92f824acf15b0ff54590b5614cf206b57e0