pbr: update to 1.1.7-29

pbr: update to 1.1.7-29

Changes from @stangri
* remove unneeded `\n` escapes
* cosmetic improvements to make code more consistent
* remove duplicate uci_get_device()
* add more output on start/stop
* remove wan up detection on boot/start
* address Tor policies errors
* prevent interface_routing() failures for downed interfaces

Changes from @bigsmile74:
* improve is_integer()
* improve is_domain()
* improve filter_options()
* imrove is_ipv4() so that is_ipv4_netmask() can be retired
* improve is_phys_dev so that is_phys_dev_quick() can be retired
* add the dhcp.lan.force=0 warning

Signed-off-by: Stan Grishin <stangri@melmac.ca>