man: Clarify --force-confask description

Mention any of the other --force-conf options can be given, not just
one. And that --force-confmiss can also be used with --force-confask.

man/dpkg.1

@@ -430,9 +430,9 @@ which case it will use that to decide the final action.
 \fBconfask\fP:
 If a conffile has been modified always offer to replace it with the
 version in the package, even if the version in the package did not
-change. If one of \fB\-\-force\-confnew\fP, \fB\-\-force\-confold\fP,
-or \fB\-\-force\-confdef\fP is also given, it will be used to decide
-the final action.
+change. If any of \fB\-\-force\-confmiss\fP, \fB\-\-force\-confnew\fP,
+\fB\-\-force\-confold\fP, or \fB\-\-force\-confdef\fP is also given,
+it will be used to decide the final action.
 
 \fBoverwrite\fP:
 Overwrite one package's file with another's file.