patch 8.0.1071: putty-color and cygwin-color are not recognized

Problem:    $TERM names starting with "putty" and "cygwin" are likely to have
            a dark background, but are not recognized.
Solution:   Only check the first few characters of $TERM to match "putty" or
            "cygwin". (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 8750360..4d040fb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1071,
+/**/
     1070,
 /**/
     1069,