Strange request in the error_log file

Hi guys,

what is this?

Code:

[Mon Sep 03 12:24:22 2007] [notice] SIGHUP received.  Attempting to restart
[Mon Sep 03 12:24:22 2007] [notice] Digest: generating secret for digest authentication ...
[Mon Sep 03 12:24:22 2007] [notice] Digest: done
[Mon Sep 03 12:24:22 2007] [notice] mod_python: Creating 4 session mutexes based on 256 max processes and 0 max threads.
[Mon Sep 03 12:24:22 2007] [notice] mod_python: using mutex_directory /tmp 
[Mon Sep 03 12:24:23 2007] [notice] Apache/2.2.4 (Unix) DAV/2 PHP/5.2.2 mod_python/3.3.1 Python/2.5 mod_ssl/2.2.4 OpenSSL/0.9.8b mod_perl/2.0.3 Perl/v5.8.8 configured -- resuming normal operations

thanks