Information passed to this script

Environment

SCRIPT_NAME=/env
SERVER_NAME=www.linkweava.net
SERVER_ADMIN=info@linkweava.net
HTTP_ACCEPT_ENCODING=gzip
HTTP_CONNECTION=Keep-Alive
HTTP_X_FORWARDED_SERVER=linkweava.net
HTTP_X_CC_ID=ccc04-02
REQUEST_METHOD=GET
HTTP_ACCEPT=text/html,application/xhtml+xml,text/xml;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
SCRIPT_FILENAME=/home/linkw/cgi/env
SERVER_SOFTWARE=Apache/2.2
HTTP_ACCEPT_CHARSET=ISO-8859-1,utf-8;q=0.7,*;q=0.7
QUERY_STRING=&f=/robots.txt
REMOTE_PORT=57813
HTTP_USER_AGENT=CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
SERVER_PORT=80
SERVER_SIGNATURE=
HTTP_PRAGMA=no-cache
HTTP_CACHE_CONTROL=no-cache
HTTP_ACCEPT_LANGUAGE=en-us,en;q=0.5
REMOTE_ADDR=195.74.53.190
SERVER_PROTOCOL=HTTP/1.1
HTTP_X_FORWARDED_HOST=dunf.destar.mobi
HTTP_X_FORWARDED_FOR=38.107.191.119
PATH=/usr/local/bin:/usr/bin:/bin
REQUEST_URI=/env?&f=/robots.txt
GATEWAY_INTERFACE=CGI/1.1
SERVER_ADDR=195.74.53.190
DOCUMENT_ROOT=/home/linkw/html/
HTTP_HOST=www.linkweava.net

These Form-variables exists

=
f=/robots.txt