Update to Linux 4.19.230, VBox Guest Additions 5.2.44, Xen Tools 7.18…

….1, Docker 19.03.15

Dockerfile

@@ -178,7 +178,7 @@ ENV LINUX_GPG_KEYS \
 		647F28654894E3BD457199BE38DBBDC86092693E
 
 # updated via "update.sh"
-ENV LINUX_VERSION 4.19.103
+ENV LINUX_VERSION 4.19.230
 
 RUN wget -O /linux.tar.xz "https://cdn.kernel.org/pub/linux/kernel/v${LINUX_VERSION%%.*}.x/linux-${LINUX_VERSION}.tar.xz"; \
 	wget -O /linux.tar.asc "https://cdn.kernel.org/pub/linux/kernel/v${LINUX_VERSION%%.*}.x/linux-${LINUX_VERSION}.tar.sign"; \
@@ -333,9 +333,9 @@ RUN make -C /usr/src/linux INSTALL_HDR_PATH=/usr/local headers_install
 
 # http://download.virtualbox.org/virtualbox/
 # updated via "update.sh"
-ENV VBOX_VERSION 5.2.36
+ENV VBOX_VERSION 5.2.44
 # https://www.virtualbox.org/download/hashes/$VBOX_VERSION/SHA256SUMS
-ENV VBOX_SHA256 6124287b7a1790436a9b0b2601154b50c6cd6e680aeff45c61d03ee1158f3eb9
+ENV VBOX_SHA256 9883ee443a309f4ffa1d5dee2833f9e35ced598686c36d159f410e5edbac1ca4
 # (VBoxGuestAdditions_X.Y.Z.iso SHA256, for verification)
 
 RUN wget -O /vbox.iso "https://download.virtualbox.org/virtualbox/$VBOX_VERSION/VBoxGuestAdditions_$VBOX_VERSION.iso"; \
@@ -381,7 +381,7 @@ RUN cp -vr /usr/src/parallels/tools/* ./; \
 
 # https://github.com/xenserver/xe-guest-utilities/tags
 # updated via "update.sh"
-ENV XEN_VERSION 7.18.0
+ENV XEN_VERSION 7.18.1
 
 RUN wget -O /xen.tgz "https://github.com/xenserver/xe-guest-utilities/archive/v$XEN_VERSION.tar.gz"; \
 	mkdir /usr/src/xen; \
@@ -412,7 +412,7 @@ RUN wget -O usr/local/sbin/cgroupfs-mount "https://github.com/tianon/cgroupfs-mo
 	chmod +x usr/local/sbin/cgroupfs-mount; \
 	tcl-chroot cgroupfs-mount
 
-ENV DOCKER_VERSION 19.03.6
+ENV DOCKER_VERSION 19.03.15
 
 # Get the Docker binaries with version that matches our boot2docker version.
 RUN DOCKER_CHANNEL='edge'; \