CURLOPT_PINNEDPUBLICKEY.3: fix the AVAILABILITY formatting

docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.3

@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
@@ -91,14 +91,23 @@ footer:
 .fi
 .SH AVAILABILITY
 PEM/DER support:
+
   7.39.0: OpenSSL, GnuTLS and GSKit
+
   7.43.0: NSS and wolfSSL/CyaSSL
+
   7.47.0: mbedtls
+
   7.49.0: PolarSSL
+
 sha256 support:
-  7.44.0: OpenSSL, GnuTLS, NSS and wolfSSL/CyaSSL.
+
+  7.44.0: OpenSSL, GnuTLS, NSS and wolfSSL/CyaSSL
+
   7.47.0: mbedtls
+
   7.49.0: PolarSSL
+
 Other SSL backends not supported.
 .SH RETURN VALUE
 Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or