chasquid-util: Add domaininfo-remove

This patch adds a chasquid-util subcommand to remove a domain
information entry.

The main use case is to manually allow a security level downgrade, after
performing manual verification.

docs/man/chasquid-util.1

@@ -129,7 +129,7 @@
 .\" ========================================================================
 .\"
 .IX Title "chasquid-util 1"
-.TH chasquid-util 1 "2018-04-03" "" ""
+.TH chasquid-util 1 "2018-05-20" "" ""
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -148,6 +148,8 @@ chasquid\-util \- chasquid management tool
 .PP
 \&\fBchasquid-util\fR [\fIoptions\fR] aliases-resolve \fIaddr\fR
 .PP
+\&\fBchasquid-util\fR [\fIoptions\fR] domaininfo-remove \fIdomain\fR
+.PP
 \&\fBchasquid-util\fR [\fIoptions\fR] print-config
 .SH "DESCRIPTION"
 .IX Header "DESCRIPTION"
@@ -169,6 +171,10 @@ Check the integrity of the domain's users database.
 .IP "\fBaliases-resolve\fR \fIaddr\fR" 8
 .IX Item "aliases-resolve addr"
 Resolve the given address.
+.IP "\fBdomaininfo-remove\fR \fIdomain\fR" 8
+.IX Item "domaininfo-remove domain"
+Remove the domain information entry. This can be used to manually allow a
+security level downgrade.
 .IP "\fBprint-config\fR" 8
 .IX Item "print-config"
 Parse and print the configuration in a human-readable way.

docs/man/chasquid-util.1.pod

@@ -15,6 +15,8 @@ B<chasquid-util> [I<options>] check-userdb I<domain>
 
 B<chasquid-util> [I<options>] aliases-resolve I<addr>
 
+B<chasquid-util> [I<options>] domaininfo-remove I<domain>
+
 B<chasquid-util> [I<options>] print-config
 
 
@@ -46,6 +48,11 @@ Check the integrity of the domain's users database.
 
 Resolve the given address.
 
+=item B<domaininfo-remove> I<domain>
+
+Remove the domain information entry. This can be used to manually allow a
+security level downgrade.
+
 =item B<print-config>
 
 Parse and print the configuration in a human-readable way.