Fix compilation issues for OpenBSD

This patch addresses compilation issues for OpenBSD. Specifically, it
addresses:
 * It allows including <sys/vmmeter.h> in asterisk.c
 * Provides a needed (size_t) cast in xmldoc.c

In 13+, it also addresses a conditional inclusion in loader.c.

Review: https://reviewboard.asterisk.org/r/4506

ASTERISK-24880 #close
Reported by: snuffy
Tested by: snuffy
patches:
  misc-openbsd.diff uploaded by snuffy (License 5024)
........

Merged revisions 433245 from http://svn.asterisk.org/svn/asterisk/branches/11
........

Merged revisions 433247 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@433248 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/asterisk.c

@@ -171,12 +171,10 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #elif defined(HAVE_SYSCTL)
 #include <sys/param.h>
 #include <sys/sysctl.h>
-#if !defined(__OpenBSD__)
 #include <sys/vmmeter.h>
 #if defined(__FreeBSD__)
 #include <vm/vm_param.h>
 #endif
-#endif
 #if defined(HAVE_SWAPCTL)
 #include <sys/swap.h>
 #endif

main/loader.c

@@ -483,7 +483,9 @@ static int is_module_loaded(const char *resource_name)
 
 static void unload_dynamic_module(struct ast_module *mod)
 {
+#if defined(HAVE_RTLD_NOLOAD)
 	char *name = ast_strdupa(ast_module_name(mod));
+#endif
 	void *lib = mod->lib;
 
 	/* WARNING: the structure pointed to by mod is going to

main/xmldoc.c

@@ -2979,7 +2979,7 @@ int ast_xmldoc_load_documentation(void)
 	globret = glob(xmlpattern, MY_GLOB_FLAGS, NULL, &globbuf);
 #endif
 
-	ast_debug(3, "gl_pathc %zu\n", globbuf.gl_pathc);
+	ast_debug(3, "gl_pathc %zu\n", (size_t)globbuf.gl_pathc);
 	if (globret == GLOB_NOSPACE) {
 		ast_log(LOG_WARNING, "XML load failure, glob expansion of pattern '%s' failed: Not enough memory\n", xmlpattern);
 		ast_free(xmlpattern);