Spaces in CNAME options break parsing.

cname = wibble,wobble

works, but

cname =	wibble, wobble

fails. Bug introduced in 2.77. commit a1d973f9

CHANGELOG

+version 2.79
+	Fix parsing of CNAME arguments, which are confused by extra spaces.
+	Thanks to Diego Aguirre for spotting the bug.
+
+
 version 2.78
         Fix logic of appending ".<layer>" to PXE basename. Thanks to Chris
 	Novakovic for the patch.

src/option.c

@@ -3862,7 +3862,7 @@ err:
 	    new->target = target;
 	    new->ttl = ttl;
 
-	    arg += strlen(arg)+1;
+	    for (arg += strlen(arg)+1; *arg == ' '; arg++);
 	  }
       
 	break;