Metacat

Modified Metacat to support large data file uploads. This is accomplished
by supporting a new content type for data sent to metacat:
multipart/form-data
which allows multiple files to be sent in a standard MIME format. The
MetacatServlet.handleGetOrPost() method now checks the incoming content...

Simplified ReplicationHandler:
It is run now in the same thread started from DBSAXHandler;
thus the same connection opened in that thread is used,
i.e. no need for new connection and no complains as "Connection is closed" in ReplicationHandler;
"Connection is closed" error happens when in the current thread there are try to use connection opened in another thread,...

support for the new terms included in pathquery.dtd

http://bugzilla.ecoinformatics.org/show_bug.cgi?id=248
Included utility function about gettig the latest docid for a user:
DBUtil.getLastDocid(username).
Metacat parameters:
action='getlastdocid'
username

don't need to override the old meta_file_id tags with docid without rev
since Morpho inserts docids before sending the docs to Metacat

added constructor in DocumentImpl for use in DBQuery.findDocuments();
this new constructor is used with getDocumentInfo() to get the doc info only;
because the other constructor builds the whole xml doc which is not needed here and time consuming;
this happens on backtracking only.

fixed bug - hardcoded LDAP URL

made use of the new property for ldaps url;
it is used for secure connection to LDAP server listening on second port 636 by default with SSL sockets;
it is used from Metacat for the authetication process only;
all the rest communications with LDAP server are made on the default port 389 with plain sockets

moved delete from xml_relation before delete from xml_documents
because of the parent-child relation b/w these 2 tables

fixed error with exception handling in metacat servlet and added new dtds to the sql script