remote: Drop KRB5_KTNAME override

When the comment in libvirtd.sasl was last updated with

  commit fe772f24a6
  Author: Cole Robinson <crobinso@redhat.com>
  Date:   Sat Oct 20 14:10:03 2012 -0400

    daemon: Avoid 'Could not find keytab file' in syslog

it was noted that only old versions of kerberos would need the
environment variable to be set: that was more than seven years
ago, so it's safe to assume that none of our current target
platforms still requires that hack and setting the appropriate
key in the configuration file will be enough.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

src/remote/libvirtd.init.in

@@ -7,7 +7,6 @@ LIBVIRTD_TIMEOUT=${LIBVIRTD_TERMTIMEOUT:-"TERM/25/KILL/5"}
 
 command="@sbindir@/libvirtd"
 command_args="-d ${LIBVIRTD_OPTS}"
-start_stop_daemon_args="--env KRB5_KTNAME=/etc/libvirt/krb5.tab"
 pidfile="@runstatedir@/libvirtd.pid"
 retry="${LIBVIRTD_TERMTIMEOUT}"
 

src/remote/libvirtd.sasl

@@ -33,9 +33,7 @@ mech_list: gssapi
 #   qemu+tcp://hostname/system?auth=sasl.gssapi
 #mech_list: scram-sha-1 gssapi
 
-# Some older builds of MIT kerberos on Linux ignore this option &
-# instead need KRB5_KTNAME env var.
-# For modern Linux, and other OS, this should be sufficient
+# File containing the service principal for libvirtd
 #
 keytab: /etc/libvirt/krb5.tab
 

src/remote/libvirtd.sysconf

@@ -11,9 +11,6 @@ LIBVIRTD_ARGS="--timeout 120"
 # can be used to listen on TCP/TLS sockets
 #LIBVIRTD_ARGS="--listen"
 
-# Override Kerberos service keytab for SASL/GSSAPI
-#KRB5_KTNAME=/etc/libvirt/krb5.tab
-
 # Override the QEMU/SDL default audio driver probing when
 # starting virtual machines using SDL graphics
 #

src/remote/virtproxyd.init.in

@@ -7,7 +7,6 @@ VIRTPROXYD_TIMEOUT=${VIRTPROXYD_TERMTIMEOUT:-"TERM/25/KILL/5"}
 
 command="@sbindir@/virtproxyd"
 command_args="-d ${VIRTPROXYD_OPTS}"
-start_stop_daemon_args="--env KRB5_KTNAME=/etc/libvirt/krb5.tab"
 pidfile="@runstatedir@/virtproxyd.pid"
 retry="${VIRTPROXYD_TERMTIMEOUT}"