https://bz.apache.org/bugzilla/show_bug.cgi?id=70123

            Bug ID: 70123
           Summary: apachectl status/fullstatus should report a clear
                    error when configured text browser is missing
           Product: Apache httpd-2
           Version: 2.4-HEAD
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: support
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

`apachectl status` and `apachectl fullstatus` rely on the text browser command
configured by the `LYNX` variable in the generated `apachectl` script,
commonly:

    LYNX="lynx -dump"

When missing, the current behavior is a raw shell error such as:

    apachectl: line 95: lynx: command not found

For `status`, this is also easy to miss because the command is piped through
`awk`.

Before running `$LYNX $STATUSURL`, `apachectl` should check whether `$LYNX`
exists. If it does not, it should print a clear diagnostic and exit nonzero.

```
apachectl: status requires a text-based browser, but '$LYNX' was not found.
Install lynx, links, or elinks, or edit the LYNX setting in apachectl.
```

The upstream source file appears to be `support/apachectl.in`

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