doveadm: Add help command

Author: slusarz

.github/actions/spelling/expect.txt

@@ -224,7 +224,6 @@ fetc
 fetchmail
 FETCHs
 fgrep
-FHIn
 fieldstr
 fileinto
 findtime

data/doveadm.js

@@ -591,7 +591,7 @@ This command cannot be used safely via API by untrusted users.`
 				cli: 'F',
 				optional: true,
 				type: doveadm_arg_types.BOOL,
-				text: `TODO (dump full and simple output and expand values).`,
+				text: `Show the configuration in a filter-based format.`,
 			},
 			f: {
 				cli: 'f',
@@ -600,12 +600,6 @@ This command cannot be used safely via API by untrusted users.`
 				type: doveadm_arg_types.STRING,
 				text: `Apply filters to limit output.`,
 			},
-			H: {
-				cli: 'H',
-				optional: true,
-				type: doveadm_arg_types.BOOL,
-				text: `TODO (verify host).`,
-			},
 			h: {
 				cli: 'h',
 				optional: true,
@@ -1401,6 +1395,20 @@ For each mailbox that has FTS data, it outputs the following key/value fields:
 		},
 	},
 
+	help: {
+		cli_only_cmd: true,
+		args: {
+			command: {
+				example: 'mailbox',
+				optional: true,
+				positional: true,
+				type: doveadm_arg_types.STRING,
+				text: `The command/group to show the man page of.`,
+			},
+		},
+		text: `Provide doveadm usage information.`,
+	},
+
 	'import': {
 		args: {
 			'source-user': {

docs/core/man/doveconf.1.md

@@ -9,7 +9,7 @@ dovecotComponent: core
 ## SYNOPSIS
 
 **doveconf**
-  [**-aCdFHInPNUwx**]
+  [**-aCdFInPNUwx**]
   [**-c** *config-file*]
   [**-f** *filter*]
 
@@ -53,7 +53,30 @@ configuration in easy human readable output.
     configured.
 
 **-F**
-:   TODO (dump full and simple output and expand values).
+:   Show the configuration in a filter-based format, which is how Dovecot
+    internally accesses it. This can be useful for debugging why configuration
+    is not working as expected.
+
+    The settings are grouped into different "structs", which are all accessed
+    independently. A new struct is started in the output as `# struct_name`.
+
+    Next is the list of filters, which begin with `:FILTER` followed by the
+    filter in the event filter syntax. An empty filter matches everything.
+    The filters are processed from end to beginning. The settings are taken
+    from the first matching filter (i.e. the last in the output). Since not
+    all filters have all settings defined, the processing continues until all
+    settings have been found.
+
+    Named list filter such as `protocols = imap pop3` are shown as
+    `protocol/imap=yes` and `protocol/pop3=yes # stop list`. The "stop list"
+    means that the value is not modified by any following filters that match.
+    If the setting was defined as `protocols { imap=yes, pop3=yes }`, the
+    "stop list" would be missing, because this setting is only adding the
+    protocols, not replacing the list.
+
+    Settings groups are included in `:INCLUDE` lines. The includes are
+    processed last, after all filters have been applied, so all settings inside
+    the groups can be overridden.
 
 **-f** *filter*
 :   Show the matching configuration for the specified *filter*
@@ -83,35 +106,6 @@ configuration in easy human readable output.
             This matches filters which were configured like:
             :   **remote 1.2.3.0/24 { # special settings }**
 
-**-F**
-:   Show the configuration in a filter-based format, which is how Dovecot
-    internally accesses it. This can be useful for debugging why configuration
-    is not working as expected.
-
-    The settings are grouped into different "structs", which are all accessed
-    independently. A new struct is started in the output as `# struct_name`.
-
-    Next is the list of filters, which begin with `:FILTER` followed by the
-    filter in the event filter syntax. An empty filter matches everything.
-    The filters are processed from end to beginning. The settings are taken
-    from the first matching filter (i.e. the last in the output). Since not
-    all filters have all settings defined, the processing continues until all
-    settings have been found.
-
-    Named list filter such as `protocols = imap pop3` are shown as
-    `protocol/imap=yes` and `protocol/pop3=yes # stop list`. The "stop list"
-    means that the value is not modified by any following filters that match.
-    If the setting was defined as `protocols { imap=yes, pop3=yes }`, the
-    "stop list" would be missing, because this setting is only adding the
-    protocols, not replacing the list.
-
-    Settings groups are included in `:INCLUDE` lines. The includes are
-    processed last, after all filters have been applied, so all settings inside
-    the groups can be overridden.
-
-**-H**
-:   TODO (verify host).
-
 **-h**
 :   Hide the setting's name, show only the setting's value.