dhcp: fix shutdown not work by SIGTERM while bind9 enable threads

In https://source.isc.org/git/bind9.git, since the following
commit applied:
...
commit b99bfa184bc9375421b5df915eea7dfac6a68a99
Author: Evan Hunt <each@isc.org>
Date:   Wed Apr 10 13:49:57 2013 -0700

    [master] unify internal and export libraries

    3550.       [func]          Unified the internal and export versions of the
                        BIND libraries, allowing external clients to use
                        the same libraries as BIND. [RT #33131]
...
(git show b99bfa184bc9375421b5df915eea7dfac6a68a99 -- ./lib/isc/unix/app.c)

In this commit, if bind9 enable threads(ISC_PLATFORM_USETHREADS),
it blocks signal SIGHUP, SIGINT and SIGTERM in isc__app_ctxstart.
Which caused dhclient/dhcpd could not be stopped by SIGTERM.

It caused systemd's reboot hung which send SIGTERM by default.

(From OE-Core rev: 7d3e734481e5d400d03ffd0a12669913fd264c5f)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb b/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb
index 0a73eccc4b..964d05dde0 100644
--- a/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb
+++ b/meta/recipes-connectivity/dhcp/dhcp_4.3.5.bb
@@ -10,6 +10,7 @@ SRC_URI += "file://dhcp-3.0.3-dhclient-dbus.patch;striplevel=0 \
             file://tweak-to-support-external-bind.patch \
             file://remove-dhclient-script-bash-dependency.patch \
             file://build-shared-libs.patch \
+            file://Moved-the-call-to-isc_app_ctxstart-to-not-get-signal.patch \
            "
 
 SRC_URI[md5sum] = "2b5e5b2fa31c2e27e487039d86f83d3f"