test: break links, spelling, and redirects to exercise every PR check (do not merge)

Check links: three absolute self-links (one to a moved page) and a dead
external link on one line; a missing page, missing heading, and wrong-case
path on the next; and the "Symbol search" heading renamed to break the
inbound anchor link from search-based-code-navigation.mdx.

Spell check: nine misspellings on one line, five of them block-list words.

Check redirects: one broken entry per category (shadowed page, #fragment
source, /docs prefix, duplicate source, chain, missing page, missing heading).

Co-authored-by: Amp <amp@ampcode.com>
Amp-Thread-ID: https://ampcode.com/threads/T-01a08fee-74b4-76dc-aaf9-d1245d68fdc9

Author: marcleblanc2

cspell-allow-list.txt

@@ -598,3 +598,4 @@ YOURUSERNAME
 Zaporizhzhia
 Zoekt
 zoomable
+aardvark # test entry for the sorted-list check (will be reverted)

docs/admin/markdown.mdx

@@ -0,0 +1,5 @@
+---
+title: TLS test page
+---
+
+# TLS test page

docs/admin/tls_ssl.mdx

@@ -37,7 +37,7 @@ Running batch changes server-side has been tested to run a simple **45K changese
 
 By default, docker on mac will build docker images for `linux/arm64`, which will result in errors when running server-side because executors provide `linux/amd64` hosts. If you're creating your own images to run in batch changes, this can be a problem. Use the `--platform linux/amd64` flag with `docker build` to build images compatible with the server-side host.
 
-## Using file mounts with server-side execution
+## Using file mounts with SSBC
 
 <Callout type="note">
 	Running a batch spec server-side with file mounts is currently only

docs/batch-changes/server-side.mdx

@@ -45,7 +45,7 @@ Searching over commit messages is supported in Sourcegraph by adding `type:commi
 
 See our [query syntax](/code-search/queries#diff-and-commit-searches-only) documentation for a comprehensive list of supported parameters.
 
-## Symbol search
+## Symbol lookup
 
 Searching for symbols makes it easier to find specific functions, variables, and more. Use the `type:symbol` filter to search for symbol results. Symbol results also appear in typeahead suggestions, so you can jump directly to symbols by name. When on an [indexed](/admin/search#indexed-search) commit, it uses Zoekt. Otherwise it uses the [symbols service](/code-search/types/symbol)
 
@@ -148,3 +148,9 @@ This file picker is useful when comparing branches with thousands of changed fil
 
 - When viewing a file or directory, press the `y` key to expand the URL to its canonical form (with the full 40-character Git commit SHA).
 - To share a link to multi-line range in a file, click on the starting line number and shift-click on the ending line number (in the left-hand gutter).
+
+Test links for the check-links workflow (will be reverted): [site config](https://sourcegraph.com/docs/admin/config/site-config), [search](//www.sourcegraph.com/docs/code-search/), [moved page](http://docs.sourcegraph.com/admin/http_https_configuration#sourcegraph-via-docker-compose-caddy-2), [dead external](https://github.com/sourcegraph/docs/blob/main/this-file-does-not-exist.md), [live external](https://github.com/sourcegraph/docs).
+
+More test links, none of which the check can fix for you: [missing page](/code-search/no-such-page), [missing heading](/code-search/features#no-such-heading), [wrong case](/Code-Search/queries).
+
+Test paragraph for the spell check workflow (will be reverted): Sourcegraph indexs every repositry acros your organization, so seach results are alwasy fresh. It keeps compatability with the databse layer, and the exector runs each batch spec in its own contiainer.

docs/code-search/features.mdx

@@ -1,6 +1,22 @@
 import {TECHNICAL_CHANGELOG_RSS_URL} from './constants';
 
 const redirectsData = [
+	{
+		source: "/docs/old-prefixed",
+		destination: "/code-ownership"
+	},
+	{
+		source: "/old-chain",
+		destination: "/admin/http_https_configuration"
+	},
+	{
+		source: "/old-ownership",
+		destination: "/code-ownershp"
+	},
+	{
+		source: "/old-ownership#anchor",
+		destination: "/code-ownership"
+	},
 	{
 		source: '/integration/img/disable_extension.png',
 		destination: '/integration/img/disable-extension.png'
@@ -5896,6 +5912,10 @@ const redirectsData = [
 		source: '/code-search/how-to/create-search-context-graphql',
 		destination: '/api'
 	},
+	{
+		source: "/admin/http_https_configuration",
+		destination: "/self-hosted/http-https-configuration"
+	}
 ];
 
 const updatedRedirectsData = redirectsData.map(redirect => {