libcurl-tlibcurl-thread: Update OpenSSL links

Because the old OpenSSL link now redirects to their master documentation
(currently 1.1.0), which does not document the required actions for
OpenSSL <= 1.0.2.

diff --git a/docs/libcurl/libcurl-thread.3 b/docs/libcurl/libcurl-thread.3
index 7b7f4dce91899b78a65d405eecc296be27ac2d4c..379ca8ffad66611c9cbced5c83d97e8eecfd55ee 100644 (file)
--- a/docs/libcurl/libcurl-thread.3
+++ b/docs/libcurl/libcurl-thread.3
@@ -41,11 +41,17 @@ then of course using the underlying SSL library multi-threaded and those libs
 might have their own requirements on this issue.  You may need to provide one
 or two functions to allow it to function properly:
 .IP OpenSSL
-https://www.openssl.org/docs/crypto/threads.html#DESCRIPTION
+OpenSSL 1.1.0 "can be safely used in multi-threaded applications provided that
+support for the underlying OS threading API is built-in."
+
+https://www.openssl.org/docs/manmaster/crypto/threads.html#DESCRIPTION
+
+OpenSSL <= 1.0.2 the user must set callbacks.
+
+https://www.openssl.org/docs/man1.0.2/crypto/threads.html#DESCRIPTION
 
 https://curl.haxx.se/libcurl/c/opensslthreadlock.html
 
-For OpenSSL versions starting with 1.1.0, no particular action is required.
 .IP GnuTLS
 http://gnutls.org/manual/html_node/Thread-safety.html
 .IP NSS