- update to NSS 4.20.1 (bnc#952810)
* requires NSPR 4.10.10
* MFSA 2015-133/CVE-2015-7181/CVE-2015-7182 (bmo#1192028, bmo#1202868)
memory corruption issues

- Install the static libfreebl.a that is needed in order to link
Sun elliptical curves provider in Java 7.

- update to NSS 3.20
New functionality:
* The TLS library has been extended to support DHE ciphersuites in
server applications.
New Functions:
* SSL_DHEGroupPrefSet - Configure the set of allowed/enabled DHE group
parameters that can be used by NSS for a server socket.
* SSL_EnableWeakDHEPrimeGroup - Enable the use of weak DHE group
parameters that are smaller than the library default's minimum size.
New Types:
* SSLDHEGroupType - Enumerates the set of DHE parameters embedded in
NSS that can be used with function SSL_DHEGroupPrefSet.
New Macros:
* SSL_ENABLE_SERVER_DHE - A socket option user to enable or disable
DHE ciphersuites for a server socket.
Notable Changes:
* For backwards compatibility reasons, the server side implementation
of the TLS library keeps all DHE ciphersuites disabled by default.
They can be enabled with the new socket option SSL_ENABLE_SERVER_DHE
and the SSL_OptionSet or the SSL_OptionSetDefault API.
* The server side implementation of the TLS implementation does not
support session tickets when using a DHE ciphersuite (see bmo#1174677).