mark MAILBOX_DRIVER_FLAG locations in code

Mailbox driver flags are defined in several places. It is essential that
they are kept in sync, so mark them with the same string for easy
grepping with an alerting boiler plate.

Signed-off-by: Michael J Gruber <github@grubix.eu>

src/driver.h

@@ -44,7 +44,8 @@ typedef struct store_conf {
 } store_conf_t;
 
 /* For message->flags */
-/* Keep the mailbox driver flag definitions in sync! */
+/* Keep the mailbox driver flag definitions in sync: */
+/* grep for MAILBOX_DRIVER_FLAG */
 /* The order is according to alphabetical maildir flag sort */
 #define F_DRAFT	     (1<<0) /* Draft */
 #define F_FLAGGED    (1<<1) /* Flagged */

src/drv_imap.c

@@ -243,6 +243,9 @@ static int imap_deref( imap_store_t *ctx );
 
 static void imap_invoke_bad_callback( imap_store_t *ctx );
 
+/* Keep the mailbox driver flag definitions in sync: */
+/* grep for MAILBOX_DRIVER_FLAG */
+/* The order is according to alphabetical maildir flag sort */
 static const char *Flags[] = {
 	"Draft",
 	"Flagged",

src/drv_maildir.c

@@ -108,6 +108,9 @@ debug( const char *msg, ... )
 	va_end( va );
 }
 
+/* Keep the mailbox driver flag definitions in sync: */
+/* grep for MAILBOX_DRIVER_FLAG */
+/* The order is according to alphabetical maildir flag sort */
 static const char Flags[] = { 'D', 'F', 'R', 'S', 'T' };
 
 static uchar

src/drv_proxy.c

@@ -55,6 +55,9 @@ debugn( const char *msg, ... )
 	va_end( va );
 }
 
+/* Keep the mailbox driver flag definitions in sync: */
+/* grep for MAILBOX_DRIVER_FLAG */
+/* The order is according to alphabetical maildir flag sort */
 static const char Flags[] = { 'D', 'F', 'R', 'S', 'T' };
 
 static char *

src/sync.c

@@ -97,6 +97,9 @@ Fprintf( FILE *f, const char *msg, ... )
 }
 
 
+/* Keep the mailbox driver flag definitions in sync: */
+/* grep for MAILBOX_DRIVER_FLAG */
+/* The order is according to alphabetical maildir flag sort */
 static const char Flags[] = { 'D', 'F', 'R', 'S', 'T' };
 
 static int