security: add PrivateKey::loadRaw() for HMAC keys

Refs: #3075
Change-Id: I535a0e1ec2a48fba0e1dccc4b77ea9900a61a464
diff --git a/.mailmap b/.mailmap
index 60170e7..967715e 100644
--- a/.mailmap
+++ b/.mailmap
@@ -5,3 +5,4 @@
 Teng Liang <philoliang2011@gmail.com>
 <lybmath2009@gmail.com> <lybmath@ucla.edu>
 Hila Ben Abraham <hilata@gmail.com>
+Laqin Fan <flq12021@gmail.com>