Properly handle @s within hints in AEL.

AEL was not handling the case of a device hint containing an @ symbol, which
caused parking hints (e.g. hint(park:exten@context)) to error out the parser.
This patch makes AEL treat the @ the same way it treats colon and ampersand
now, meaning the characters are included in verbatim.

(closes issue #14941)
Reported by: bpgoldsb
Patches:
      bug14941.patch uploaded by seanbright (license 71)
Tested by: bpgoldsb


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@189462 65c4cc65-6c06-0410-ace0-fbb531ad65f3

pbx/ael/ael.y

@@ -384,6 +384,15 @@ hint_word : word { $$ = $1; }
 			free($3);
 		}
 	}
+	| hint_word AT word {
+		if (asprintf(&($$), "%s@%s", $1, $3) < 0) {
+			ast_log(LOG_WARNING, "asprintf() failed\n");
+			$$ = NULL;
+		} else {
+			free($1);
+			free($3);
+		}
+	}
 	;
 
 word3_list : word { $$ = $1;}