patch 8.0.1658: capitalize argument not available in long form

Problem:    Capitalize argument not available in long form.
Solution:   Recognize -capitalize.  Update man page.
diff --git a/src/version.c b/src/version.c
index 1178d9b..ac06f38 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1658,
+/**/
     1657,
 /**/
     1656,