Release v1.31.0

What's Changed

• Add point add/dbl to ec_nistp_felem_meth and rename it to ec_nistp_meth by @dkostic in #1654
• Added constant_time_select array and entry_from_table by @dkostic in #1660
• Use params to build_compilation_database.sh by @justsmth in #1647
• Replace OPENSSL_NO_TLS_PHA with SSL_VERIFY_POST_HANDSHAKE by @WillChilds-Klein in #1668
• Make DH_check consistent with OpenSSL by @dkostic in #1642
• Update ACVP SHAKE test implementations by @billbo-yang in #1663
• [main] Make SSL_select_next_proto more robust to invalid calls. by @skmcgrail in #1675
• Better support legacy DES customers by @andrewhop in #1671
• AT_HWCAP2 not always defined by @justsmth in #1682
• Added generic EC scalar rwnaf encoding for ec_nistp by @dkostic in #1664
• Prepare for release v1.31.0 by @andrewhop in #1683

Full Changelog: v1.30.1...v1.31.0