InCommon metadata support

[Tom Scavo <>]

FYI, the per-entity metadata server at mdq-beta.incommon.org is now
serving 4651 SAML EntityDescriptors, including more than 1500 IdPs and
3100 SPs. See the Per-Entity Metadata Pilot wiki page for more
information: https://spaces.internet2.edu/x/3w7kAg

$ MD_LOCATION=http://mdq-beta.incommon.org/global/entities
$ MD_PATH=/tmp/all-global-metadata.xml
$ curl --silent --dump-header /dev/tty $MD_LOCATION > $MD_PATH
HTTP/1.1 200 OK
Date: Wed, 28 Jan 2015 18:14:58 GMT
X-Application-Context: application:sign:80
Content-Language: en-US
Content-Type: application/samlmetadata+xml; charset=UTF-8
ETag: "d00770823eb94270d1bd19370928a9eebb71fd1f"
Content-Length: 27214196
Server: Jetty(9.2.4.v20141103)

$ cat /tmp/all-global-metadata.xml | ./misc/md-inspector/md_inspect.sh
Metadata file name: (stdin)
Metadata file size: 27214196 bytes
Metadata entity group: (none)
Metadata publisher: (unknown)
Metadata publication date: (unknown)
Metadata expiration date (validUntil): 2015-02-11T18:14:59.673Z
Metadata refresh interval (cacheDuration): P0Y0M0DT6H0M0.000S
Metadata file is signed (use -s option for advanced security features)
Number of registrars: 29
Number of organizations: 1760
Number of SAML entities: 4651
Number of IdP roles: 1517
Number of IdP roles that support SAML2: 1508
Number of IdP roles with an errorURL: 145
Number of SP roles: 3137
Number of SP roles that support SAML2: 3037