nautilus-autorun-software: handle mime type x-content/unix-software only

This is a consequence of the fix for
https://bugs.freedesktop.org/show_bug.cgi?id=20562 .

This undoes the part of cffb9cf7025 that hardcodes that media with
x-content/win32-software are silently ignored, and thus improves on the fix for
#524270.

Wine or something could now provide a handler for win32-software.

diff --git a/data/nautilus-autorun-software.desktop.in.in b/data/nautilus-autorun-software.desktop.in.in
--- a/data/nautilus-autorun-software.desktop.in.in
+++ b/data/nautilus-autorun-software.desktop.in.in
@@ -7,7 +7,7 @@
 Terminal=false
 StartupNotify=true
 Type=Application
-MimeType=x-content/software;
+MimeType=x-content/unix-software;
 X-GNOME-Bugzilla-Bugzilla=GNOME
 X-GNOME-Bugzilla-Product=nautilus
 X-GNOME-Bugzilla-Component=general
diff --git a/libnautilus-private/nautilus-autorun.c b/libnautilus-private/nautilus-autorun.c
--- a/libnautilus-private/nautilus-autorun.c
+++ b/libnautilus-private/nautilus-autorun.c
@@ -875,13 +875,6 @@
 	ret = FALSE;
 	mount_name = NULL;
 
-	if (g_content_type_is_a (x_content_type, "x-content/win32-software")) {
-		/* don't pop up the dialog anyway if the content type says
- 		 * windows software.
- 		 */
-		goto out;
-	}
-
 	user_forced_dialog = is_shift_pressed ();
 
 	nautilus_autorun_get_preferences (x_content_type, &pref_start_app, &pref_ignore, &pref_open_folder);
