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, 11 insertions, 4 deletions

diff --git a/gnu/services/mail.scm b/gnu/services/mail.scm
index 4ad6ddb534..d99743ac31 100644
--- a/gnu/services/mail.scm
+++ b/gnu/services/mail.scm
@@ -1600,7 +1600,9 @@ greyed out, instead of only later giving \"not selectable\" popup error.
                        (service-extension pam-root-service-type
                                           (const %dovecot-pam-services))
                        (service-extension activation-service-type
-                                          %dovecot-activation)))))
+                                          %dovecot-activation)))
+                (description "Run Dovecot, a mail server that can run POP3,
+IMAP, and LMTP.")))
 
 (define* (dovecot-service #:key (config (dovecot-configuration)))
   "Return a service that runs @command{dovecot}, a mail server that can run
@@ -1729,7 +1731,9 @@ match from local for any action outbound
           (service-extension profile-service-type
                              (compose list opensmtpd-configuration-package))
           (service-extension shepherd-root-service-type
-                             opensmtpd-shepherd-service)))))
+                             opensmtpd-shepherd-service)))
+   (description "Run the OpenSMTPD, a lightweight @acronym{SMTP, Simple Mail
+Transfer Protocol} server.")))
 
 
 ;;;
@@ -1754,7 +1758,9 @@ match from local for any action outbound
    (extensions
     (list (service-extension etc-service-type mail-aliases-etc)))
    (compose concatenate)
-   (extend append)))
+   (extend append)
+   (description "Provide a @file{/etc/aliases} file---an email alias
+database---computed from the given alias list.")))
 
 
 ;;;
@@ -1831,7 +1837,8 @@ exim_group = exim
           (service-extension account-service-type (const %exim-accounts))
           (service-extension activation-service-type exim-activation)
           (service-extension profile-service-type exim-profile)
-          (service-extension mail-aliases-service-type (const '()))))))
+          (service-extension mail-aliases-service-type (const '()))))
+   (description "Run the Exim mail transfer agent (MTA).")))
 
 
 ;;;