Downgrade nvidia proprietary driver warning

sway/main.c

@@ -63,8 +63,7 @@ void detect_proprietary() {
 			break;
 		}
 		if (strstr(line, "nvidia")) {
-			fprintf(stderr, "\x1B[1;31mWarning: Proprietary nvidia drivers do NOT support Wayland. Use nouveau.\x1B[0m\n");
-			fprintf(stderr, "\x1B[1;31mYes, they STILL don't work with the newly announced wayland \"support\".\x1B[0m\n");
+			fprintf(stderr, "\x1B[1;31mWarning: Proprietary nvidia driver support is considered experimental.\x1B[0m\n");
 			free(line);
 			break;
 		}

sway/sway.1.txt

@@ -51,9 +51,6 @@ rather than switch to something else.
 Launch sway directly from a tty or via your favorite Wayland-compatible login
 manager.
 
-*Important note for nvidia users*: The proprietary nvidia driver does _not_ have
-support for Wayland as of 2016-06-10. Use nouveau.
-
 Commands
 --------