Adding some mail headers

mailnews/mime/public/nsMailHeaders.h

@@ -44,6 +44,7 @@
 #define HEADER_FCC							            "FCC"
 #define HEADER_FOLLOWUP_TO					        "Followup-To"
 #define HEADER_FROM							            "From"
+#define HEADER_STATUS							            "Status"
 #define HEADER_LINES						            "Lines"
 #define HEADER_MESSAGE_ID					          "Message-ID"
 #define HEADER_MIME_VERSION					        "MIME-Version"
@@ -61,6 +62,7 @@
 #define HEADER_SENDER					            	"Sender"
 #define HEADER_SUBJECT				          		"Subject"
 #define HEADER_TO						              	"To"
+#define HEADER_APPROVED_BY						              	"Approved-By"
 #define HEADER_X_MAILER			          			"X-Mailer"
 #define HEADER_X_NEWSREADER				        	"X-Newsreader"
 #define HEADER_X_POSTING_SOFTWARE		      	"X-Posting-Software"