Log Message:
c-icap-modules: update to 0.5.3

c-icap-modules-0.5.3 changes
- Add support for ClamAV 0.101.x
- Bug fix: use url-decoded string as filename on viralator mode

c-icap-modules-0.5.2 changes
- virus_scan: Add the counter AV_SCAN_FAILURES to count scan engine failures
- virus_scan: fix error handling when PassOnError is set to on
- virus_scan: Report correctly the X-Violations-Found header and the \ 
virus_scan:viruses-list attribute.
- url_check: Fix misplaced space in added headers using the HttpHeaderReplace \ 
and HttpHeaderAdd* rules

c-icap-modules-0.4.5 changes
- Fixes to compile with the c-icap-0.5.x releases