Merge "Highlight new requirement"

diff --cc RELEASE-NOTES-1.27
index 7c50e4f,039aa05..e644ae4
--- 1/RELEASE-NOTES-1.27
--- 2/RELEASE-NOTES-1.27
+++ b/RELEASE-NOTES-1.27
@@@ -11,10 -11,8 +11,10 @@@ HHVM 3.1. Additionally, the following P
  * ctype
  * iconv
  * json
- * mbstring
+ * mbstring (new requirement in 1.27)
  * xml
 +The following PHP extensions are strongly recommended:
 +* openssl
  
  === Configuration changes in 1.27 ===
  * $wgAllowMicrodataAttributes and $wgAllowRdfaAttributes were removed,