[LEDE-DEV] procd: cherry-pick fixes into lede-17.01 branch

[Daniel Golle]

Hi!

I've created a lede-17.01 branch for procd so fixes can be
cherry-picked from master onto that branch.

I suggest to pick the commits listed below:
453116e system: introduce new attribute board_name
e5b963a preinit: define _GNU_SOURCE
e5ff8ca upgraded: cmake: Find and include uloop.h
f367ec6 hotplug: fix a memory leak in handle_button_complete()
796ba3b service/service_stopped(): fix a use-after-free
79bbe6d system: return legacy board name
e7bb2c8 upgraded: define __GNU_SOURCE
992b796 rcS: add missing fcntl.h include
d42b21e procd/rcS: Use /dev/null as stdin
1247db1 procd: Log initscript output prefixed with script name
8d720b2 procd: Don't use syslog before its initialization
2555474 procd: Add missing \n in debug message
8f218f5 procd: service gets deleted when its last instance is freed

I would **not** pick:
63789e5 init: add support for sysupgrades triggered from preinit
5b1fb35 Remove code that has become unnecessary after sysupgrade changes
5918b6d upgraded: add support for passing a "command" argument to stage2
056d8dd upgraded: link dynamically, chroot during exec
7c6cf55 system: always support staged sysupgrade
e0098d4 service/instance: add an auto start option
abedd7f procd: update modprobe path


Unless someone objects within 1 week from now, I take it as a passive
consensus and will update the lede-17.01 branch as well as the procd
package Makefile on the lede-17.01 branch.


Cheers


Daniel