Move http-restful-server to builtin TLS, plus minor nits

tutorials/http/http-restful-server/Makefile

@@ -5,7 +5,7 @@ SOURCES = main.c mongoose.c       # Source code files
 CFLAGS = -W -Wall -Wextra -g -I.  # Build options
 
 # Mongoose build options. See https://mongoose.ws/documentation/#build-options
-CFLAGS_MONGOOSE += -DMG_ENABLE_LINES=1
+CFLAGS_MONGOOSE += -DMG_ENABLE_LINES=1 -DMG_TLS=MG_TLS_BUILTIN
 
 ifeq ($(OS),Windows_NT)   # Windows settings. Assume MinGW compiler. To use VC: make CC=cl CFLAGS=/MD OUT=/Feprog.exe
   PROG ?= example.exe           # Use .exe suffix for the binary
@@ -13,20 +13,13 @@ ifeq ($(OS),Windows_NT)   # Windows settings. Assume MinGW compiler. To use VC:
   CFLAGS += -lws2_32            # Link against Winsock library
   DELETE = cmd /C del /Q /F /S  # Command prompt command to delete files
   OUT ?= -o $(PROG)             # Build output
-  MAKE += WINDOWS=1 CC=$(CC)
 endif
 
-all: $(PROG)              # Default target. Build and run program
+all: $(PROG)
 	$(RUN) ./$(PROG) $(ARGS)
 
-$(PROG): $(SOURCES)       # Build program from sources
+$(PROG): $(SOURCES) Makefile
 	$(CC) $(SOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) $(OUT)
 
-clean:                    # Cleanup. Delete built program and all build artifacts
-	$(DELETE) $(PROG) *.o *.obj *.exe *.dSYM mbedtls
-
-# see https://mongoose.ws/tutorials/tls/#how-to-build for TLS build options
-
-mbedtls:                  # Pull and build mbedTLS library
-	git clone --depth 1 -b v2.28.2 https://github.com/mbed-tls/mbedtls $@
-	$(MAKE) -C mbedtls/library
+clean:
+	$(DELETE) $(PROG) *.o *.obj *.exe *.dSYM