Bug#500862: vzctl: does not setup /etc/mailname

The vzctl startup script /etc/vz/dists/scripts/debian-set_hostname.sh
does not setup /etc/mailname properly. It's left with localhost set.

The following patch should solve this. It also removes a small cosmetic
bug: The function set_hostname did not use the ${cfgfile} variable.

--- /tmp/debian-set_hostname.sh 2008-10-01 15:32:06.000000000 +0200
+++ /etc/vz/dists/scripts/debian-set_hostname.sh 2008-10-01 15:32:19.000000000 +0200
@@ -32,11 +32,12 @@
        local hostname=$2

        [ -z "${hostname}" ] && return 0
- echo "${hostname}" > /etc/hostname
+ echo "${hostname}" > ${cfgfile}
        hostname ${hostname}
 }

 change_hostname /etc/hosts "${HOSTNM}" "${IP_ADDR}"
 set_hostname /etc/hostname "${HOSTNM}"
+set_hostname /etc/mailname "${HOSTNM}"

 exit 0


-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (900, 'stable'), (500, 'proposed-updates'), (90, 'testing')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/dash
Kernel: Linux 2.6.26-bpo.1-openvz-686
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)

Versions of packages vzctl depends on:
ii iproute 20061002-3 Professional tools to control the
ii libc6 2.3.6.ds1-13etch7 GNU C Library: Shared libraries
ii vzquota 3.0.11-1 server virtualization solution - q

Versions of packages vzctl recommends:
ii rsync 2.6.9-2etch2 fast remote file copy program (lik