patch 8.0.0056
Problem:    When setting 'filetype' there is no check for a valid name.
Solution:   Only allow valid characters in 'filetype', 'syntax' and 'keymap'.
diff --git a/src/version.c b/src/version.c
index 0b62f9c..f63041e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    56,
+/**/
     55,
 /**/
     54,