submission: Add 8BITMIME and BINARYMIME back to supported capabilities.

These are supported when the backend provides support. These were erroneously
disabled earlier by 3bf0c0e.

src/submission/submission-common.h

@@ -19,10 +19,11 @@
 /* Maximum time to wait for QUIT reply from relay server */
 #define SUBMISSION_MAX_WAIT_QUIT_REPLY_MSECS 2000
 
-#define SUBMISSION_SUPPORTED_SMTP_CAPABILITIES                      \
-	(SMTP_CAPABILITY_AUTH | SMTP_CAPABILITY_PIPELINING |          \
-	 SMTP_CAPABILITY_SIZE | SMTP_CAPABILITY_ENHANCEDSTATUSCODES | \
-	 SMTP_CAPABILITY_CHUNKING | SMTP_CAPABILITY_BURL |            \
+#define SUBMISSION_SUPPORTED_SMTP_CAPABILITIES                          \
+	(SMTP_CAPABILITY_AUTH | SMTP_CAPABILITY_PIPELINING |            \
+	 SMTP_CAPABILITY_SIZE | SMTP_CAPABILITY_ENHANCEDSTATUSCODES |   \
+	 SMTP_CAPABILITY_8BITMIME | SMTP_CAPABILITY_CHUNKING |          \
+	 SMTP_CAPABILITY_BINARYMIME | SMTP_CAPABILITY_BURL |            \
 	 SMTP_CAPABILITY_DSN | SMTP_CAPABILITY_VRFY)
 
 typedef void submission_client_created_func_t(struct client **client);