Adding button to clear havp access log

Do not know how to catch button press event, therefor 'clearlog_x' parameter taken from $_POST array during debug (similar to 'start'/'stop' events).
Change of find pattern in havp access log file

After switching from clamd to libclamav in havp.inc webConfigurator stop parsing of log file because of strong search pattern for clamd - "virus clamd:". Make it more universal.
File to view HAVP error log

File to render "Log" tab with HAVP error log contents. Need to be placed to /usr/local/www folder.
Add tab to view HAVP error log
Add tab to view HAVP error log
Update havp_avset.xml
Bump HAVP package version due to last changes
Bump HAVP package version due to last changes
Bump HAVP package version due to last changes
Merge pull request #741 from SunStroke74/patch-2
Merge pull request #757 from SunStroke74/patch-3
Merge pull request #758 from SunStroke74/patch-4