Make trustmanager reload CRLs by default.  Fixes #80.

Conflicts:

	ssl-proxies/src/main/java/org/globus/gsi/CertificateRevocationLists.java
	ssl-proxies/src/main/java/org/globus/gsi/trustmanager/X509ProxyCertPathValidator.java
Fix error message and list implementation, as suggested by code review.