Broken links (zsh website manual index pages)

[Takeshi Banse <thb@xxxxxxxxx>]

It seems that some letter links in the manual index pages are broken.

For example "Concept Index" page's "jump to letter D"'s link.
http://zsh.sourceforge.net/Doc/Release/Concept-Index.html

'D' points to the link:
http://zsh.sourceforge.net/Doc/Release/zsh_1.html#index_split-0_cp_letter-D

But zsh_1.html does not exist. Here is the server response:
____
An error has been encountered in accessing this page. 
1. Server: zsh.sourceforge.net
2. URL path: /Doc/Release/zsh_1.html
3. Error notes: NONE
4. Error type: 404
5. Request method: GET
6. Request query string: NONE
7. Time: 2019-04-26 16:22:04 UTC (1556295724) 
____

Those "jump to letter" 'D' to 'Z' links are broken.

And every index pages on
http://zsh.sourceforge.net/Doc/
have erroneous jump-to-letters such that:

* Concept Index:
http://zsh.sourceforge.net/Doc/Release/Concept-Index.html
('E' .. 'Z')

* Variables Index:
http://zsh.sourceforge.net/Doc/Release/Variables-Index.html
('J' .. 'Z')

* Options Index
http://zsh.sourceforge.net/Doc/Release/Options-Index.html
('D' .. 'Z')

* Functions Index
http://zsh.sourceforge.net/Doc/Release/Functions-Index.html
('C' .. 'Z')

* Editor Functions Index
http://zsh.sourceforge.net/Doc/Release/Editor-Functions-Index.html
('N' .. 'Z')

* Style and Tag Index 
http://zsh.sourceforge.net/Doc/Release/Style-and-Tag-Index.html
('G' .. 'Z')

(Some letters at the front are correct).

I guess that the commit ab07560c5c04769cc2c479fc75807341c392fa37 of
web.git repository would be the cause.