SSLContext

Summary:
Move SSLContext to folly.

Test Plan: It builds.

Reviewed By: dcsommer@fb.com

Subscribers: jdperlow, atlas2-eng@, wormhole-diffs@, bwester, trunkagent, doug, ps, bmatheny, ssl-diffs@, alikhtarov, njormrod, mshneer, folly-diffs@, andrewcox, alandau, jsedgwick, fugalh

FB internal diff: D1631924

Signature: t1:1631924:1414616562:9a67dbf20f00eb8fbcb35880efcb94c0fae07dcc

folly/Makefile.am

@@ -143,6 +143,7 @@ nobase_follyinclude_HEADERS = \
 	io/async/NotificationQueue.h \
 	io/async/HHWheelTimer.h \
 	io/async/Request.h \
+	io/async/SSLContext.h \
 	io/async/TimeoutManager.h \
 	json.h \
 	Lazy.h \
@@ -269,6 +270,7 @@ libfolly_la_SOURCES = \
 	io/async/EventBaseManager.cpp \
 	io/async/EventHandler.cpp \
 	io/async/Request.cpp \
+	io/async/SSLContext.cpp \
 	io/async/HHWheelTimer.cpp \
 	json.cpp \
 	detail/MemoryIdler.cpp \