Remove dependency on xmalloc.

Remove ssh_get_progname's dependency on xmalloc, which should reduce
link order problems.  ok djm@

openbsd-compat/bsd-misc.c

@@ -31,8 +31,6 @@
 #include <time.h>
 #include <unistd.h>
 
-#include "xmalloc.h"
-
 #ifndef HAVE___PROGNAME
 char *__progname;
 #endif
@@ -43,13 +41,12 @@ char *__progname;
  */
 char *ssh_get_progname(char *argv0)
 {
+	char *p, *q;
 #ifdef HAVE___PROGNAME
 	extern char *__progname;
 
-	return xstrdup(__progname);
+	p = __progname;
 #else
-	char *p;
-
 	if (argv0 == NULL)
 		return ("unknown");	/* XXX */
 	p = strrchr(argv0, '/');
@@ -57,9 +54,12 @@ char *ssh_get_progname(char *argv0)
 		p = argv0;
 	else
 		p++;
-
-	return (xstrdup(p));
 #endif
+	if ((q = strdup(p)) == NULL) {
+		perror("strdup");
+		exit(1);
+	}
+	return q;
 }
 
 #ifndef HAVE_SETLOGIN