11894 zonecfg export should quote strings

@@ -21,10 +21,11 @@
 
 /*
  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
  * Copyright 2014 Gary Mills
+ * Copyright 2019 Joyent, Inc.
  */
 
 /*
  * zonecfg is a lex/yacc based command interpreter used to manage zone
  * configurations.  The lexer (see zonecfg_lex.l) builds up tokens, which

@@ -1825,11 +1826,11 @@
         char *quote_str;
 
         if (strlen(prop_id) == 0)
                 return;
         quote_str = quoteit(prop_id);
-        (void) fprintf(of, "%s %s=%s\n", cmd_to_str(CMD_SET),
+        (void) fprintf(of, "%s %s=\"%s\"\n", cmd_to_str(CMD_SET),
             pt_to_str(prop_num), quote_str);
         free(quote_str);
 }
 
 void