Log Message:
update squid pacakge to 2.5.3 (squid-2.5.STABLE3).

Changes to squid-2.5.STABLE3 (25 May 2003):

	- Bug #573: Occational false negatives in external acl lookups
	- Bug #577: assertion failed: cbdata.c:224: "c->y == c" when
	  external_acl helpers crashes
	- Bug #590: Squid may hang or behave oddly on shutdown while
	  requests is being processed.
	- Bug #590: external acl lookups does not deal well with queue
	  overload
	- cache_effective_user documentation update
	- cache_peer documentation update for htcp and carp
	- Bug #600: The example header_access paranoid setting is
	  missing WWW-Authenticate
	- Bug #605: Segmentation fault in idnsGrokReply() on certain
	  platforms
	- Fixes to build properly on AIX 5
	- Bug #574: wb_group updated to version 1.1 to make group names
	  case insensitive and correct a segfault issue in the helper
	- SNMP mib updates to make cacheNumObjCount,
	  cacheCurrentUnlinkRequests, cacheCurrentSwapSize and cacheClients
	  correctly report as gauges (was reporting as counters).
	- Woraround for --enable-ssl Kerberos issue on RedHat 9
	- Bug #579: Close and repopen log files on "squid -k reconfigure"
	- Bug #598: squid_ldap_auth could segfault if LDAP server is
	  unavailable
	- Bug #609,#612: msntauth helper fixes in dealing with large
 	  or non-existing allow/deny user files.
	- Bug #620: acl ident REQUIRED matches even if the ident lookup fails
	- Bug #432: reply_body_max_size fails with ident or proxy_auth acls
	  and also fails to block large objects where the content-length
	  is not known
	- Bug #606: Basic auth looping and gets stuck at high CPU usage when
	  multiple proxy_auth ACLs combined in one line and login fails.
	- squid_ldap_auth updated with support for TLS and SSL
	- Bug #623: segfault if using negated external acls in certain
	  configurations involving other acls later on the same http_access
	  line.
	- Bug #622: wb_group helper update to version 1.2 to ass support for
	  Domain-Qualified groups refering to groups in a specific domain
	- Bug #596: logic error in poll() error management
	- Bug #597: logic errors in error management
	- Bug #591: segmentation fault in authentication on "squid -k debug"
	- Bug #587: smb_auth fails on complex logins involving domain names
	  or other odd characters
	- Bug #558, #587: smb_auth.pl fails on complex logins involving
          domain names or other odd characters
	- Bug #643: external_acl fails with ttl=0 due to a change introduced
	  by the patch for Bug #553 in 2.5.STABLE2.
	- Bug #630: minor issues in digest authantication causing random
	  authentication failures and incompability with many mainstream
	  browser digest implementations due to browser qop bugs. To deal
	  with those broken browser nonce_stricness now defaults to off,
	  and two new digest options have been added (check_nonce_count
	  and post_workaround) to allow workarounds to other quite bad
	  browser bugs if needed.
	- Bug #644: digest authentication fails on requests with one
	  or more comma in the requested URL
	- Bug #648: deny_info TCP_RESET not working. The fix for this also
	  adds the ability to send redirects.