The following is the error log from my web host:

[Tue Apr 20 06:49:39 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:39 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+engurl+
[Tue Apr 20 06:49:35 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:35 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+wtcurl+
[Tue Apr 20 06:49:31 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:31 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+suburl+
[Tue Apr 20 06:49:30 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:30 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+hcurl+
[Tue Apr 20 06:49:30 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:30 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+hxurl+
[Tue Apr 20 06:49:29 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:29 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+moreurl+
[Tue Apr 20 06:49:28 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:28 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+ptnurl+
[Tue Apr 20 06:49:21 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:21 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+veurl+top10[i+5]+
[Tue Apr 20 06:49:21 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:21 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+veurl+top10[i]+
[Tue Apr 20 06:49:20 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/404.shtml
[Tue Apr 20 06:49:20 2004] [error] [client 211.152.14.97] File does not exist: /home/[Removed]/public_html/+veurl+vname+

Can anyone tell me what does those +something+ means?