readline: more reliable server

Author: scivision

libraries.json

@@ -20,8 +20,8 @@
   "sha256": "e3bd4d5d3d025a36c21dd6af7ea818a2afcd4dfc1ea5a17b39d7854bcd0c06e3"
 },
 "readline": {
-  "url": "ftp://ftp.cwru.edu/pub/bash/readline-8.1.tar.gz",
-  "sha256": "f8ceb4ee131e3232226a17f51b164afc46cd0b9e6cef344be87c65962cb82b02"
+  "url": "https://ftp.gnu.org/gnu/readline/readline-8.1.2.tar.gz",
+  "sha256": "7589a2381a8419e68654a47623ce7dfcb756815c8fee726b98f90bf668af7bc6"
 },
 "ssl": {
   "url": "https://github.com/openssl/openssl.git",