Consistently reference CID draft through name + URL

library/ssl_cli.c

diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index f6d9048..4eedce8 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -443,8 +443,8 @@
     const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     /*
-     * Quoting
-     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05:
+     * Quoting draft-ietf-tls-dtls-connection-id-05
+     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
      *
      *   struct {
      *      opaque cid<0..2^8-1>;

library/ssl_srv.c

diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index bd7f80b..08758f6 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -450,8 +450,8 @@
     }
 
     /*
-     * Quoting
-     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05:
+     * Quoting draft-ietf-tls-dtls-connection-id-05
+     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
      *
      *   struct {
      *      opaque cid<0..2^8-1>;
@@ -2169,8 +2169,8 @@
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding CID extension" ) );
 
     /*
-     * Quoting
-     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05:
+     * Quoting draft-ietf-tls-dtls-connection-id-05
+     * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
      *
      *   struct {
      *      opaque cid<0..2^8-1>;