package/apache: security bump to version 2.4.38

package/apache: security bump to version 2.4.38

Fixes the following security vulnerabilities:

  *) SECURITY: CVE-2018-17199 (cve.mitre.org)
     mod_session: mod_session_cookie does not respect expiry time allowing
     sessions to be reused.  [Hank Ibell]

  *) SECURITY: CVE-2018-17189 (cve.mitre.org)
     mod_http2: fixes a DoS attack vector. By sending slow request bodies
     to resources not consuming them, httpd cleanup code occupies a server
     thread unnecessarily. This was changed to an immediate stream reset
     which discards all stream state and incoming data.  [Stefan Eissing]

  *) SECURITY: CVE-2019-0190 (cve.mitre.org)
     mod_ssl: Fix infinite loop triggered by a client-initiated
     renegotiation in TLSv1.2 (or earlier) with OpenSSL 1.1.1 and
     later.  PR 63052.  [Joe Orton]

For more details, see the CHANGES file:
https://www.apache.org/dist/httpd/CHANGES_2.4.38

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>