schannel: Updated mingw32 makefiles

lib/Makefile.m32

@@ -115,6 +115,11 @@ endif
 ifeq ($(findstring -ipv6,$(CFG)),-ipv6)
 IPV6 = 1
 endif
+ifeq ($(findstring -schannel,$(CFG)),-schannel)
+SCHANNEL = 1
+SSPI = 1
+SSL = 1
+endif
 
 INCLUDES = -I. -I../include
 CFLAGS += -DBUILDING_LIBCURL
@@ -136,6 +141,9 @@ ifdef SSH2
   DLL_LIBS += -L"$(LIBSSH2_PATH)/win32" -lssh2
 endif
 ifdef SSL
+ifdef SCHANNEL
+  CFLAGS += -DUSE_SSL -DUSE_SCHANNEL
+else
   ifndef OPENSSL_INCLUDE
     ifeq "$(wildcard $(OPENSSL_PATH)/outinc)" "$(OPENSSL_PATH)/outinc"
       OPENSSL_INCLUDE = $(OPENSSL_PATH)/outinc
@@ -163,6 +171,7 @@ ifdef SSL
             -DCURL_WANTS_CA_BUNDLE_ENV
   DLL_LIBS += -L"$(OPENSSL_LIBPATH)" $(OPENSSL_LIBS)
 endif
+endif
 ifdef ZLIB
   INCLUDES += -I"$(ZLIB_PATH)"
   CFLAGS += -DHAVE_LIBZ -DHAVE_ZLIB_H