patch 8.0.1719: cannot specify which Python executable configure should use

Problem:    Cannot specify which Python executable configure should use.
Solution:   Add --with-python-command and --with-python3-command.
diff --git a/src/version.c b/src/version.c
index be4e4ed..7ce1c9c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1719,
+/**/
     1718,
 /**/
     1717,