Bug 18670: Remove RewriteLog and RewriteLogLevel from sample config files

Bug 18670: Remove RewriteLog and RewriteLogLevel from sample config files

It looks like RewriteLog will no longer work with Apache 2.4 and later.

RewriteLog
Those familiar with earlier versions of mod_rewrite will
no doubt be looking for the RewriteLog and RewriteLogLevel
directives. This functionality has been completely replaced
by the new per-module logging configuration mentioned above.
http://httpd.apache.org/docs/current/mod/mod_rewrite.html

All lines removed were commented out, so there should be
no change in behaviour or side effects.

To test.
- Verify every mention of RewriteLog has been removed from Koha
- Verify patch by reading it

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>