Added templates/lxc-centos for CentOS containers.

This adds an lxc-centos template for crreating CentOS 5+ templates.  It
does NOT create CentOS 4 or earlier containers as these are way past
end of life and no longer supported.  It is based on the work of
Fajar A. Nugraha <github@fajar.net> who modified an earlier Fedora
template.  His work has been brought LARGELY into congruence with
the current Fedora template.  It still lacks the distro agnostic
bootstrap and systemd code from the Fedora template but those should
only be relevant with CentOS 7 when that can of worms pops open
sometime next year or so.

Signed-off-by: Michael H. Warfield <mhw@WittsEnd.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

.gitignore

@@ -29,6 +29,7 @@ templates/lxc-alpine
 templates/lxc-altlinux
 templates/lxc-archlinux
 templates/lxc-busybox
+templates/lxc-centos
 templates/lxc-cirros
 templates/lxc-debian
 templates/lxc-fedora

configure.ac

@@ -25,13 +25,14 @@ AC_GNU_SOURCE
 # Detect the distribution. This is used for the default configuration and
 # for some distro-specific build options.
 AC_MSG_CHECKING([host distribution])
-AC_ARG_WITH(distro, AS_HELP_STRING([--with-distro=DISTRO], [Specify the Linux distribution to target: One of redhat, oracle, fedora, suse, gentoo, debian, arch, slackware, paldo, openmandriva or pardus.]))
+AC_ARG_WITH(distro, AS_HELP_STRING([--with-distro=DISTRO], [Specify the Linux distribution to target: One of redhat, oracle, centos, fedora, suse, gentoo, debian, arch, slackware, paldo, openmandriva or pardus.]))
 if test "z$with_distro" = "z"; then
 	with_distro=`lsb_release -is`
 fi
 if test "z$with_distro" = "z"; then
 	AC_CHECK_FILE(/etc/redhat-release,with_distro="redhat")
 	AC_CHECK_FILE(/etc/oracle-release,with_distro="oracle")
+	AC_CHECK_FILE(/etc/centos-release,with_distro="centos")
 	AC_CHECK_FILE(/etc/fedora-release,with_distro="fedora")
 	AC_CHECK_FILE(/etc/SuSE-release,with_distro="suse")
 	AC_CHECK_FILE(/etc/gentoo-release,with_distro="gentoo")
@@ -52,7 +53,7 @@ case $with_distro in
 	ubuntu)
 		distroconf=default.conf.ubuntu
 		;;
-	redhat|fedora|oracle|oracleserver)
+	redhat|centos|fedora|oracle|oracleserver)
 		distroconf=default.conf.libvirt
 		;;
 	*)
@@ -534,6 +535,7 @@ AC_CONFIG_FILES([
 	templates/lxc-ubuntu-cloud
 	templates/lxc-opensuse
 	templates/lxc-busybox
+	templates/lxc-centos
 	templates/lxc-fedora
 	templates/lxc-openmandriva
 	templates/lxc-oracle

templates/Makefile.am

@@ -5,6 +5,7 @@ templates_SCRIPTS = \
 	lxc-ubuntu \
 	lxc-ubuntu-cloud \
 	lxc-opensuse \
+	lxc-centos \
 	lxc-fedora \
 	lxc-openmandriva \
 	lxc-oracle \