Grab bag of documentation updates.

 * README.md: mention yescrypt
 * README.md: document required tools for building from a Git
   checkout (issue #23)
 * README.md: document that -flto cannot be used due to
   incompatibility with symbol versioning (issue #24)
 * README.md: use curly quotes and apostrophes; use out-of-line
   hyperlinks for better readability as plain text
 * AUTHORS: say that the sunmd5 hash module is a clean-room
   reimplementation to avoid the CDDL
 * THANKS: move prior contributor credits here from README;
   alphabetize; mention Dmitry Levin, Alec Muffett, and Colin Percival

 * crypt_gensalt.3: document errno codes that can occur when
   obtaining random bytes from the operating system fails

1 files changed, 10 insertions, 3 deletions

diff --git a/THANKS b/THANKS
index 83c5439..e8880c6 100644
--- a/THANKS
+++ b/THANKS
@@ -1,5 +1,12 @@
-This library is new, but we would like to extend our thanks in advance
-to everyone who will, in the future, send us bug reports, suggestions,
-and contributions.
+As mentioned in the README, many people have contributed to the code
+making up libxcrypt, often under the aegis of a different project.  Of
+the past contributors, we particularly wish to credit David Burren,
+Ulrich Drepper, Alec Muffett, Colin Percival, and Thorsten Kukuk.
+
+As well as the present maintainers, active contributors to the library
+include Solar Designer and Dmitry V. Levin.
+
+We would also like to extend our thanks in advance to everyone who
+will, in the future, send us bug reports, suggestions, and contributions.
 
   -- The Authors.