Update documentation. Use the namespace name "personal", instead of "private".

@@ -33,3 +33,4 @@ m4
 mailutils*.tar.*
 pathdefs.h
 stamp-h1
+tmp/

-GNU mailutils NEWS -- history of user-visible changes. 2017-01-16
+GNU mailutils NEWS -- history of user-visible changes. 2017-01-20
 Copyright (C) 2002-2017 Free Software Foundation, Inc.
 See the end of file for copying conditions.
 
@@ -7,6 +7,52 @@ Please send mailutils bug reports to <bug-mailutils@gnu.org>.
 
 Version 3.1.91 (Git)
 
+* configuration syntax
+
+Statements that allow for variable substitution also allow for command
+expansion.  Commands are invoked the same way as in shell:
+
+   $(command [args...])
+
+The following commands are defined:
+
+ - localpart X
+     Treats X as an email address and returns its part preceding
+     the @-sign.  If there is no @-sign, returns X unchanged.
+
+ - domainpart X
+     Treats X as an email address and returns the part following
+     the @-sign.  If there is no @-sign, returns empty string.
+
+ - shell CMD [ARGS...]
+     Runs the shell command CMD with the given arguments.  Returns
+     the standard output from the command.  The command is invoked
+     using "/bin/sh -c" and can contain any valid shell construct.
+
+* imap4d
+
+Namespace configuration completely rewritten.  The "namespace" block
+statement defines a particular namespaces.  Within it, one or more
+"prefix" statements define prefixes available in that namespace, along
+with their mappings to the server filesystem, hierarchy delimiters etc.
+
+An example of namespace configuration:
+
+     namespace personal {
+        prefix "" {
+           directory "$home/mailfolder";
+        }
+        prefix "#MH:" {
+           directory "$home/Mail";
+           delimiter "/";
+           mailbox-type "mh";
+        }
+     }
+
+The following configuration statements have been withdrawn: homedir,
+personal-namespace, other-namespace, shared-namespace,
+other-mailbox-mode, shared-mailbox-mode.
+
 * mail
 
 ** Modifying attachment name and filename
@@ -24,7 +70,7 @@ description), and file name:
 
 Both options affect only the next `--attach' or `--attach-fd' option.
 
-** Constructing attachments from command line
+** Constructing attachments from the command line
 
 The new option `--attach-fd=N' instructs mail to read attachment from
 file descriptor N.  By default, the attachments created using this

@@ -419,10 +419,12 @@ static struct mu_cfg_param prefix_param[] = {
     N_("Directory in the file system") },
   { "delimiter", mu_cfg_callback,
     NULL, mu_offsetof (struct namespace_prefix, delim), cb_prefix_delim,
-    N_("Hierarchy delimiter character") },
+    N_("Hierarchy delimiter character"),
+    N_("arg: character") },
   { "mailbox-type", mu_cfg_callback,
     NULL, 0, cb_prefix_scheme,
-    N_("Type of mailboxes residing under this prefix") },
+    N_("Type of mailboxes residing under this prefix"),
+    N_("type: string") },
   { NULL }
 };
 
@@ -524,7 +526,7 @@ namespace_cfg_init (void)
   if (mu_create_canned_section ("namespace", &section))
     abort ();
   section->docstring = N_("Define a namespace");
-  section->label = "private | other | shared";
+  section->label = "personal | other | shared";
   section->parser = namespace_section_parser;
   mu_cfg_section_add_params (section, namespace_param);
 }
@@ -556,29 +558,6 @@ static struct mu_cfg_param imap4d_cfg_param[] = {
   
   { "namespace", mu_cfg_section },
   
-#if 0
-  { "homedir", mu_c_string, &modify_homedir, 0, NULL,
-    N_("Modify home directory.") },
-
-  { "personal-namespace", MU_CFG_LIST_OF(mu_c_string), &namespace[NS_PRIVATE],
-    0, NULL, 
-    N_("Set personal namespace.") },
-  { "other-namespace", MU_CFG_LIST_OF(mu_c_string), &namespace[NS_OTHER],
-    0, NULL, 
-    N_("Set other users' namespace.") },
-  { "shared-namespace", MU_CFG_LIST_OF(mu_c_string), &namespace[NS_SHARED],
-    0, NULL,
-    N_("Set shared namespace.") },
-  FIXME
-  { "other-mailbox-mode", mu_cfg_callback, &mailbox_mode[NS_OTHER], 0,
-    cb_mailbox_mode,
-    N_("File mode for mailboxes in other namespace."),
-    N_("mode: g(+|=)[wr]+,o(+|=)[wr]+") },
-  { "shared-mailbox-mode", mu_cfg_callback, &mailbox_mode[NS_SHARED], 0,
-    cb_mailbox_mode,
-    N_("File mode for mailboxes in shared namespace."),
-    N_("mode: g(+|=)[wr]+,o(+|=)[wr]+") },
-#endif
   { "login-disabled", mu_c_bool, &login_disabled, 0, NULL,
     N_("Disable LOGIN command.") },
   { "create-home-dir", mu_c_bool, &create_home_dir, 0, NULL,

@@ -161,7 +161,7 @@ struct imap4d_command
 #define ERR_STREAM_CREATE     9
 
 /* Namespace numbers */
-#define NS_PRIVATE 0
+#define NS_PERSONAL 0
 #define NS_OTHER   1
 #define NS_SHARED  2
 #define NS_MAX     3

@@ -19,7 +19,7 @@
 #include <mailutils/assoc.h>
 
 struct namespace namespace[NS_MAX] = {
-  [NS_PRIVATE] = { "private" },
+  [NS_PERSONAL] = { "personal" },
   [NS_OTHER]    = { "other" },
   [NS_SHARED]   = { "shared" }
 };
@@ -124,7 +124,7 @@ namespace_init (void)
   pfx = mu_assoc_get (prefixes, "");
   if (pfx)
     {
-      if (pfx->ns != NS_PRIVATE)
+      if (pfx->ns != NS_PERSONAL)
 	{
 	  mu_error (_("empty prefix not allowed in the namespace %s"),
 		    namespace[pfx->ns].name);
@@ -139,7 +139,7 @@ namespace_init (void)
       pfx->prefix = mu_strdup ("");
       pfx->dir = mu_strdup ("$home");
       pfx->delim = '/';
-      priv = namespace_lookup ("private");
+      priv = namespace_lookup ("personal");
       mu_list_prepend (priv->prefixes, pfx);
       rc = mu_assoc_install (prefixes, pfx->prefix, pfx);
       if (rc)
@@ -167,7 +167,7 @@ prefix_translate_name (struct namespace_prefix const *pfx, char const *name,
 	url = 0;
       name += pfxlen;
 
-      if (pfx->ns == NS_PRIVATE && strcmp (name, "INBOX") == 0)
+      if (pfx->ns == NS_PERSONAL && strcmp (name, "INBOX") == 0)
 	{
 	  tmpl = mu_strdup (auth_data->mailbox);
 	  return tmpl;//FIXME
@@ -299,7 +299,7 @@ namespace_translate_name (char const *name, int url,
       
       switch (pfx->ns)
 	{
-	case NS_PRIVATE:
+	case NS_PERSONAL:
 	  mu_assoc_install (assoc, "user", auth_data->name);
 	  mu_assoc_install (assoc, "home", real_homedir);
 	  break;
@@ -423,7 +423,7 @@ imap4d_namespace (struct imap4d_session *session,
 
   io_sendf ("* NAMESPACE ");
 
-  print_namespace (NS_PRIVATE);
+  print_namespace (NS_PERSONAL);
   io_sendf (" ");
   print_namespace (NS_OTHER);
   io_sendf (" ");

@@ -18,7 +18,7 @@ gsasl {
 	enable off;
 }
 
-namespace private {
+namespace personal {
 	prefix "" {
 		directory "$HOMEDIR";
 	}