New global variable mu_site_rcfile keeps the name of the site-wide configuration file.

* include/mailutils/gocs.h (mu_site_rcfile): New extern.
* include/mailutils/libcfg.h (MU_CONFIG_FILE): Remove.
(mu_register_cfg_capa): Remove proto.
(mu_libcfg_register_capa): New proto.
* libmailutils/cfg/gocs.c (mu_site_rcfile): New variable.

* libmu_argp/muinit.c (mu_app_init): Use mu_site_rcfile instead
of MU_CONFIG_FILE.
Destroy parse_tree when no longer needed.
* libmu_cfg/init.c (cfg_capa_table): Static.
(find_cfg_capa): Likewise.
(reserved_name): Treat names starting with dot as reserved.
(mu_libcfg_register_capa): New function.
(mu_libcfg_parse_config): Use mu_site_rcfile instead
of MU_CONFIG_FILE.
* mu/query.c (mutool_query): Use mu_site_rcfile instead
of MU_CONFIG_FILE.

@@ -70,6 +70,7 @@ struct mu_gocs_virtual
 };
 
 /* Auxiliary variables for use by libargp/libcfg */
+extern char *mu_site_rcfile;
 extern int mu_load_user_rcfile;
 extern int mu_load_site_rcfile;
 extern char *mu_load_rcfile;

@@ -25,10 +25,6 @@
 #include <mailutils/error.h>
 #include <mailutils/errno.h>
 
-#ifndef MU_CONFIG_FILE
-# define MU_CONFIG_FILE SYSCONFDIR "/mailutils.rc"
-#endif
-
 #ifndef MU_USER_CONFIG_FILE
 # define MU_USER_CONFIG_FILE "~/.mailutils"
 #endif
@@ -44,10 +40,7 @@ struct mu_cfg_capa
   mu_cfg_section_fp parser;
 };
 
-extern int mu_register_cfg_capa (const char *name,
-				 struct mu_cfg_param *cfgparam,
-				 mu_cfg_section_fp *parser);
-
+extern int mu_libcfg_register_capa (struct mu_cfg_capa *capa);
 extern void mu_libcfg_init (char **cnames);
 extern int mu_parse_config_files (struct mu_cfg_param *param,
 				  void *target_ptr) MU_CFG_DEPRECATED;

@@ -38,6 +38,11 @@
 #include <mailutils/log.h>
 #include <syslog.h>
 
+#ifndef MU_CONFIG_FILE
+# define MU_CONFIG_FILE SYSCONFDIR "/mailutils.rc"
+#endif
+
+char *mu_site_rcfile = MU_CONFIG_FILE;
 int mu_load_user_rcfile = 1;
 int mu_load_site_rcfile = 1;
 char *mu_load_rcfile = NULL;

@@ -158,7 +158,7 @@ mu_app_init (struct argp *myargp, const char **capa,
       mu_asprintf (&comment,
 		   "For use in global configuration file (%s), enclose it "
 		   "in `program %s { ... };",
-		   MU_CONFIG_FILE,
+		   mu_site_rcfile,
 		   mu_program_name);		   
       mu_cfg_format_docstring (stream, comment, 0);
       free (comment);
@@ -207,6 +207,7 @@ mu_app_init (struct argp *myargp, const char **capa,
   
   mu_gocs_flush ();
   mu_cfg_destroy_tree (&mu_argp_tree);
+  mu_cfg_destroy_tree (&parse_tree);
 
   return !!(rc || mu_cfg_error_count);
 }

@@ -24,7 +24,8 @@
 #include <string.h>
 #include <stdlib.h>
 
-struct mu_cfg_capa *cfg_capa_table[] = {
+#define CFG_CAPA_MAX 512
+static struct mu_cfg_capa *cfg_capa_table[CFG_CAPA_MAX] = {
 #define S(c) &__mu_common_cat3__(mu_,c,_cfg_capa)
   S (auth),
   S (mailbox),
@@ -44,7 +45,9 @@ struct mu_cfg_capa *cfg_capa_table[] = {
   NULL
 };
 
-struct mu_cfg_capa *
+static int cfg_capa_index = MU_ARRAY_SIZE(cfg_capa_table) - 1;
+
+static struct mu_cfg_capa *
 find_cfg_capa (const char *name)
 {
   int i;
@@ -60,12 +63,25 @@ reserved_name (const char *name)
 {
   static char *reserved[] = { "common", NULL };
   char **p;
+
+  if (name[0] == '.')
+    return 1;
+  
   for (p = reserved; *p; p++)
     if (strcmp (name, *p) == 0)
       return 1;
   return 0;
 }
 
+int
+mu_libcfg_register_capa (struct mu_cfg_capa *capa)
+{
+  if (cfg_capa_index == CFG_CAPA_MAX)
+    return MU_ERR_NOENT;
+  cfg_capa_table[cfg_capa_index++] = capa;
+  return 0;
+}
+
 void
 mu_libcfg_init (char **cnames)
 {
@@ -100,7 +116,7 @@ mu_libcfg_parse_config (mu_cfg_tree_t **ptree)
   if (mu_load_site_rcfile)
     {
       hints.flags |= MU_CFG_PARSE_SITE_RCFILE;
-      hints.site_rcfile = MU_CONFIG_FILE;
+      hints.site_rcfile = mu_site_rcfile;
     }
   
   if (mu_load_user_rcfile && mu_program_name)
@@ -134,7 +150,7 @@ mu_parse_config_files (struct mu_cfg_param *param, void *target)
   
   if (mu_load_site_rcfile)
     {
-      rc = mu_parse_config (MU_CONFIG_FILE, mu_program_name, param,
+      rc = mu_parse_config (mu_site_rcfile, mu_program_name, param,
 			    flags | MU_PARSE_CONFIG_GLOBAL, target);
       if (rc == ENOMEM)
 	{

@@ -114,7 +114,7 @@ mutool_query (int argc, char **argv)
     }
 
   hints.flags |= MU_CFG_PARSE_SITE_RCFILE | MU_PARSE_CONFIG_GLOBAL;
-  hints.site_rcfile = file_name ? file_name : MU_CONFIG_FILE;
+  hints.site_rcfile = file_name ? file_name : mu_site_rcfile;
   
   if (mu_cfg_parse_config (&tree, &hints))
     return 1;