reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

  poky: 87e3a9739d
  meta-openembedded: 6094ae18c8
  meta-security: 31dc4e7532
  meta-raspberrypi: a48743dc36
  meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
  poky:
    17726d0 systemd-systemctl-native: handle Install wildcards

  meta-openembedded:
    4321a5d libtinyxml2: update to 7.0.1
    042f0a3 libcereal: Add native and nativesdk classes
    e23284f libcereal: Allow empty package
    030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
    179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
  meta-aspeed:
    Brad Bishop (1):
          aspeed: add yocto 2.6 compatibility

  meta-ibm:
    Brad Bishop (1):
          ibm: prepare for yocto 2.6

  meta-ingrasys:
    Brad Bishop (1):
          ingrasys: set layer compatibility to yocto 2.6

  meta-openpower:
    Brad Bishop (1):
          openpower: set layer compatibility to yocto 2.6

  meta-phosphor:
    Brad Bishop (3):
          phosphor: set layer compatibility to thud
          phosphor: libgpg-error: drop patches
          phosphor: react to fitimage artifact rename

    Ed Tanous (4):
          Dropbear: upgrade options for latest upgrade
          yocto2.6: update openssl options
          busybox: remove upstream watchdog patch
          systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openembedded/meta-networking/recipes-irc/znc/znc_git.bb b/meta-openembedded/meta-networking/recipes-irc/znc/znc_git.bb
index c2d7156..8c6979c 100644
--- a/meta-openembedded/meta-networking/recipes-irc/znc/znc_git.bb
+++ b/meta-openembedded/meta-networking/recipes-irc/znc/znc_git.bb
@@ -5,13 +5,13 @@
 
 DEPENDS = "openssl zlib icu"
 
-PV = "1.6.0"
+PV = "1.7.1"
 
 SRC_URI = "git://github.com/znc/znc.git;name=znc \
            git://github.com/jimloco/Csocket.git;destsuffix=git/third_party/Csocket;name=Csocket \
           "
-SRCREV_znc = "f47e8465efa4e1cd948b9caae93ac401b4355df8"
-SRCREV_Csocket = "07b4437396122650e5b8fb3d014e820a5decf4ee"
+SRCREV_znc = "c426898b3a1b899dfe8a8b2a3eeb4b18d8be1bf2"
+SRCREV_Csocket = "e8d9e0bb248c521c2c7fa01e1c6a116d929c41b4"
 
 # This constructs a composite revision based on multiple SRCREV's.
 #