call it upgrade instead of update

added client options:
auto_search - start upgrade search on login
advanced_mode - offer more options like package_editing

message before sysupgrade

more verbose Makefile

moved acls to client

Signed-off-by: Paul Spooren <paul@spooren.de>

due to renaming .rpcd was forgotten in the Makefile

Signed-off-by: Paul Spooren <paul@spooren.de>

add ubus call to perform a sysupgrade and acl file for the attended
sysupgrade use case as well uci defaults.
Package is a part of the GSoC 17 project implementing easy
sysupgrade functionality.

Signed-off-by: Paul Spooren <paul@spooren.de>