Mod Rewrite Middleware Checklist

**Features implemented in mod_rewrite:**
Types:
- [x] RewriteCond
- [x] RewriteRule

Flags:
- [x] Cookie
- [x] Escape Back References
- [x] End
- [x] Forbidden
- [x] Gone
- [x] Last
- [x] No Case
- [x] Query String Append
- [x] Query String Delete
- [x] Redirect

Server Variables:
- [x] HTTP_ACCEPT
- [x] HTTP_COOKIE
- [x] HTTP_FORWARDED
- [x] HTTP_HOST
- [x] HTTP_REFERER
- [x] HTTP_USER_AGENT
- [x] CONN_REMOTE_ADDR
- [x] QUERY_STRING
- [x] REMOTE_ADDR
- [x] IPV6
- [x] REMOTE_PORT
- [x] REQUEST_METHOD
- [x] SCRIPT_FILENAME
- [x] SERVER_ADDR
- [x] SERVER_PORT
- [x] SERVER_PROTOCOL
- [x] TIME_YEAR
- [x] TIME_MON
- [x] TIME_DAY
- [x] TIME_HOUR
- [x] TIME_MIN
- [x] TIME_SEC
- [x] TIME_WDAY
- [x] TIME
- [x] HTTPS
- [x] REQUEST_FILENAME
- [x] REQUEST_SCHEME
- [x] REQUEST_URI

CondPattern:
- [x] Integer Comparison
- [x] String Comparison
- [x] Is File
- [x] Is Directory
- [x] Size

**Features that are not implemented in mod_rewrite:**
Types:
- [ ] RewriteBase
- [ ] RewriteMap
- [ ] RewriteEngine

Flags:
- [ ] Chain
- [ ] Discard Path
- [ ] Env
- [ ] Next
- [ ] No Escape
- [ ] Pass Through
- [ ] Query String Last
- [ ] Skip

Server Variables:
- [ ] PATH_INFO

CondPattern:
- [ ] Symbolic Link

**Features that will most likely not be implemented (not supported)**
Types:
- [ ] RewriteOptions

Flags:
- [ ] Handler
- [ ] No Subrequest
- [ ] No Vary
- [ ] Proxy
- [ ] Type

Server Variables:
- [ ] HTTP_PROXY_CONNECTION
- [ ] AUTH_TYPE
- [ ] CONTEXT_PREFIX
- [ ] CONTEXT_DOCUMENT_ROOT
- [ ] REMOTE_HOST
- [ ] REMOTE_IDENT
- [ ] REMOTE_USER
- [ ] DOCUMENT_ROOT
- [ ] SCRIPT_GROUP
- [ ] SCRIPT_USER
- [ ] SERVER_ADMIN
- [ ] SERVER_NAME
- [ ] SERVER_SOFTWARE
- [ ] API_VERSION
- [ ] CONN_REMOTE_ADDR
- [ ] IS_SUBREQ
- [ ] REMOTE_ADDR
- [ ] THE_REQUEST
- [ ] Segmented Lookups (Ex HTTP:header)

CondPattern:
- [ ] Existing Url via subrequest
- [ ] Executable

The issue provides a checklist but names no source files, tests, or entry points. Start by locating the mod_rewrite middleware and its existing feature tests, then determine which unchecked items are in scope. Done means the agreed supported features are implemented and the checklist and tests accurately reflect the result.

Written by the indexing model from the issue text.