Upgrade to Dropbear 71

The issue I asked to be fixed is in the new version of dropbear.
The problem was causing robot test code from running remote
commands like ipmitool.  I had to work around the issue building
my own private 'requests' robot code.  Now that it is fixed
you do not need any special code for Robot test automation
Additional details can be found here...
https://github.com/robotframework/SSHLibrary/issues/128
diff --git a/yocto-poky/meta/recipes-core/dropbear/dropbear.inc b/yocto-poky/meta/recipes-core/dropbear/dropbear.inc
index 9d65020..a2c736e 100644
--- a/yocto-poky/meta/recipes-core/dropbear/dropbear.inc
+++ b/yocto-poky/meta/recipes-core/dropbear/dropbear.inc
@@ -17,7 +17,6 @@
            file://0003-configure.patch \
            file://0004-fix-2kb-keys.patch \
            file://0007-dropbear-fix-for-x32-abi.patch \
-           file://0010-stop-robot-test-SSHLibrary-from-hanging.patch \
            file://init \
            file://dropbearkey.service \
            file://dropbear@.service \
diff --git a/yocto-poky/meta/recipes-core/dropbear/dropbear/0010-stop-robot-test-SSHLibrary-from-hanging.patch b/yocto-poky/meta/recipes-core/dropbear/dropbear/0010-stop-robot-test-SSHLibrary-from-hanging.patch
deleted file mode 100644
index 851c89f..0000000
--- a/yocto-poky/meta/recipes-core/dropbear/dropbear/0010-stop-robot-test-SSHLibrary-from-hanging.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From aa4ff477eed539085609dc9a8a011ff2f010bd1c Mon Sep 17 00:00:00 2001
-From: Chris Austen <austenc@us.ibm.com>
-Date: Fri, 6 Nov 2015 13:15:54 -0600
-Subject: [PATCH] stop robot test SSHLibrary from hanging
-
-This reverts a change made in this commit
-
-https://github.com/mkj/dropbear/commit/ca86726f9f943b2b18e5694b442d3d2e1c0fa903
----
- common-channel.c | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/common-channel.c b/common-channel.c
-index abe5941..5a02d73 100644
---- a/common-channel.c
-+++ b/common-channel.c
-@@ -258,6 +258,8 @@ void channelio(fd_set *readfds, fd_set *writefds) {
- 			do_check_close = 1;
- 			ses.channel_signal_pending = 0;
- 		}
-+
-+do_check_close = 1;
- 	
- 		/* handle any channel closing etc */
- 		if (do_check_close) {
--- 
-1.9.1
-
diff --git a/yocto-poky/meta/recipes-core/dropbear/dropbear_2015.68.bb b/yocto-poky/meta/recipes-core/dropbear/dropbear_2015.68.bb
deleted file mode 100644
index 1b749d7..0000000
--- a/yocto-poky/meta/recipes-core/dropbear/dropbear_2015.68.bb
+++ /dev/null
@@ -1,4 +0,0 @@
-require dropbear.inc
-
-SRC_URI[md5sum] = "7664ac10f7cc2301c530eb80c756fc5d"
-SRC_URI[sha256sum] = "55ea7c1e904ffe4b1cdbe1addca8291a2533d7d285fd22ac33608e9502a62446"
diff --git a/yocto-poky/meta/recipes-core/dropbear/dropbear_2015.71.bb b/yocto-poky/meta/recipes-core/dropbear/dropbear_2015.71.bb
new file mode 100644
index 0000000..4dabefa
--- /dev/null
+++ b/yocto-poky/meta/recipes-core/dropbear/dropbear_2015.71.bb
@@ -0,0 +1,4 @@
+require dropbear.inc
+
+SRC_URI[md5sum] = "2ccc0a2f3e37ca221db12c5af6a88137"
+SRC_URI[sha256sum] = "376214169c0e187ee9f48ae1a99b3f835016ad5b98ede4bfd1cf581deba783af"