apache: Update to 2.4.52

apache: Update to 2.4.52

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
For details see:
https://dlcdn.apache.org//httpd/CHANGES_2.4.52

Excerpt from changelog:

""Changes with Apache 2.4.52

  *) SECURITY: CVE-2021-44790: Possible buffer overflow when parsing
     multipart content in mod_lua of Apache HTTP Server 2.4.51 and
     earlier (cve.mitre.org)
     A carefully crafted request body can cause a buffer overflow in
     the mod_lua multipart parser (r:parsebody() called from Lua
     scripts).
     The Apache httpd team is not aware of an exploit for the
     vulnerabilty though it might be possible to craft one.
     This issue affects Apache HTTP Server 2.4.51 and earlier.
     Credits: Chamal

  *) SECURITY: CVE-2021-44224: Possible NULL dereference or SSRF in
     forward proxy configurations in Apache HTTP Server 2.4.51 and
     earlier (cve.mitre.org)
     A crafted URI sent to httpd configured as a forward proxy
     (ProxyRequests on) can cause a crash (NULL pointer dereference)
     or, for configurations mixing forward and reverse proxy
     declarations, can allow for requests to be directed to a
     declared Unix Domain Socket endpoint (Server Side Request
     Forgery).
     This issue affects Apache HTTP Server 2.4.7 up to 2.4.51
     (included).
     Credits: 漂亮é¼
     TengMA(@Te3t123)
..."
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>