sstp: make sstp great again. simplify ssl handlers, fix crashes, move to async ppp

 TODO: accounting/statistics, minimize syscall & memory usage

accel-pppd/ctrl/sstp/CMakeLists.txt

@@ -2,4 +2,6 @@ INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
 
 ADD_LIBRARY(sstp SHARED sstp.c)
 
+TARGET_LINK_LIBRARIES(sstp util)
+
 INSTALL(TARGETS sstp LIBRARY DESTINATION lib${LIB_SUFFIX}/accel-ppp)

accel-pppd/ctrl/sstp/sstp_prot.h

@@ -73,11 +73,6 @@ enum {
 };
 
 /* State */
-#define STATE_INIT				0
-#define STATE_ESTB				1
-#define STATE_PPP				2
-#define STATE_FIN				3
-#define STATE_CLOSE				4
 enum {
 	STATE_SERVER_CALL_DISCONNECTED = 0,
 	STATE_SERVER_CONNECT_REQUEST_PENDING,