Tweak SSH documentation to add reference to env update
Tweak SSH documentation to add reference to env update

Its important the user specifically updates to a later branch that
includes this update. It is also important for the end-user to update
their pip dependencies which includes a jinja ipaddr filter used for
network string parsing

conorsch/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,heartsucker/securedrop,heartsucker/securedrop,conorsch/securedrop,conorsch/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop