News entries for Nettle-3.7.

diff --git a/ChangeLog b/ChangeLog
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+++ b/ChangeLog
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 2020-12-26  Niels Möller  <nisse@lysator.liu.se>
 
+       * NEWS: News entries for Nettle-3.7.
+
        * Makefile.in (distdir): Distribute the README files in assembly
        directories.
 

diff --git a/NEWS b/NEWS
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+NEWS for the Nettle 3.7 release
+
+       This release adds one new feature, the bcrypt password hashing
+       function, and lots of optimizations.
+
+       The release adds PowerPC64 assembly for a few algorithms,
+       resulting in great speedups. Benchmarked on a Power9 machine,
+       speedup was 13 times for AES256-CTR and AES256-GCM, and 3.5
+       times for Chacha. Since the new PowerPC64 code depends on
+       optional instructions, it is not enabled by default. The
+       recommended way to enable it, with runtime detection of
+       available instructions, is to configure with --enable-fat.
+
+       The new version is intended to be fully source and binary
+       compatible with Nettle-3.6. The shared library names are
+       libnettle.so.8.1 and libhogweed.so.6.1, with sonames
+       libnettle.so.8 and libhogweed.so.6.
+
+       New features:
+
+       * Support for bcrypt, contributed by Stephen R. van den Berg.
+
+       Optimizations:
+
+       * Much faster AES and GCM on PowerPC64 processors supporting
+         the corresponding crypto extensions. Contributed by Mamone
+         Tarsha.
+
+       * Speed of Chacha improved on PowerPC64, x86_64 and ARM Neon.
+
+       * Speed of Salsa20 improved on x86_64 and ARM Neon.
+
+       * Overhaul of some elliptic curve primitives, improving ECDSA
+         signature speed.
+
+       Miscellaneous:
+
+       * Use a few more gmp-6.1 functions: mpn_cnd_add_n,
+         mpn_cnd_sub_n, mpn_cnd_swap. Delete corresponding internal
+         Nettle functions.
+
+       * Convert all assembly files to use the default m4 quote
+         characters.
+
 NEWS for the Nettle 3.6 release
 
        This release adds a couple of new features, most notable being