services: Add missing 'description' fields.

* gnu/services/databases.scm (postgresql-service-type)[description]: New field.
(memcached-service-type)[description]: New field.
(mysql-service-type)[description]: New field.
(redis-service-type)[description]: New field.
* gnu/services/desktop.scm (geoclue-service-type)[description]: New
field.
(udisks-service-type)[description]: New field.
(elogind-service-type)[description]: New field.
(account-service-type)[description]: New field.
* gnu/services/kerberos.scm (krb5-service-type)[description]: New field.
(pam-krb5-service-type)[description]: New field.
* gnu/services/lirc.scm (lirc-service-type)[description]: New field.
* gnu/services/mail.scm (dovecot-service-type)[description]: New field.
(opensmtpd-service-type)[description]: New field.
(mail-aliases-service-type)[description]: New field.
(exim-service-type)[description]: New field.
* gnu/services/monitoring.scm (zabbix-server-service-type)[description]:
New field.
(zabbix-agent-service-type)[description]: New field.
* gnu/services/nfs.scm (rpcbind-service-type)[description]: New field.
(pipefs-service-type)[description]: New field.
(gss-service-type)[description]: New field.
(idmap-service-type)[description]: New field.
* gnu/services/spice.scm (spice-vdagent-service-type)[description]: New field.
* gnu/services/sysctl.scm (sysctl-service-type)[description]: New field.
* gnu/services/virtualization.scm (libvirt-service-type)[description]:
New field.
(virtlog-service-type)[description]: New field.
* gnu/services/vpn.scm (openvpn-server-service-type)[description]: New field.
(openvpn-client-service-type)[description]: New field.
(wireguard-service-type)[description]: New field.
* gnu/services/web.scm (httpd-service-type)[description]: New field.
(fcgiwrap-service-type)[description]: New field.
(agate-service-type)[description]: New field.
[name]: Fix.

1 files changed, 4 insertions, 1 deletions

diff --git a/gnu/services/spice.scm b/gnu/services/spice.scm
index 3b88e29043..e5ec46b9b5 100644
--- a/gnu/services/spice.scm
+++ b/gnu/services/spice.scm
@@ -69,7 +69,10 @@
     (list (service-extension shepherd-root-service-type
                              spice-vdagent-shepherd-service)
           (service-extension profile-service-type
-                             spice-vdagent-profile)))))
+                             spice-vdagent-profile)))
+   (description "Start the @command{vdagentd} and @command{vdagent} daemons
+from the @code{spice-vdagent} package to enable window resizing and clipboard
+sharing for @acronym{VM, virtual machine} guests.")))
 
 (define* (spice-vdagent-service
           #:optional (config (spice-vdagent-configuration)))