patch 8.0.0316: :help z? does not work

Problem:    ":help z?" does not work. (Pavol Juhas)
Solution:   Remove exception for z?.
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 8fda8d4..5b118e5 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -6503,7 +6503,7 @@
     static char *(mtable[]) = {"*", "g*", "[*", "]*", ":*",
 			       "/*", "/\\*", "\"*", "**",
 			       "cpo-*", "/\\(\\)", "/\\%(\\)",
-			       "?", ":?", "?<CR>", "g?", "g?g?", "g??", "z?",
+			       "?", ":?", "?<CR>", "g?", "g?g?", "g??",
 			       "/\\?", "/\\z(\\)", "\\=", ":s\\=",
 			       "[count]", "[quotex]",
 			       "[range]", ":[range]",
@@ -6513,7 +6513,7 @@
     static char *(rtable[]) = {"star", "gstar", "[star", "]star", ":star",
 			       "/star", "/\\\\star", "quotestar", "starstar",
 			       "cpo-star", "/\\\\(\\\\)", "/\\\\%(\\\\)",
-			       "?", ":?", "?<CR>", "g?", "g?g?", "g??", "z?",
+			       "?", ":?", "?<CR>", "g?", "g?g?", "g??",
 			       "/\\\\?", "/\\\\z(\\\\)", "\\\\=", ":s\\\\=",
 			       "\\[count]", "\\[quotex]",
 			       "\\[range]", ":\\[range]",
diff --git a/src/version.c b/src/version.c
index 7162239..68af6ff 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    316,
+/**/
     315,
 /**/
     314,