Fix src/CMakeLists.txt

Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>

src/CMakeLists.txt

@@ -21,7 +21,7 @@ option(UHTTPD_USE_OPENSSL "Force select OpenSSL" OFF)
 option(UHTTPD_USE_WOLFSSL "Force select WolfSSL(CyaSSL)" OFF)
 option(UHTTPD_USE_MBEDTLS "Force select MbedTLS(PolarSSL)" OFF)
 
-set(SSL_NAME OFF)
+set(SSL_NAME "")
 set(UHTTPD_HAVE_OPENSSL_CONFIG 0)
 set(UHTTPD_HAVE_WOLFSSL_CONFIG 0)
 set(UHTTPD_HAVE_MBEDTLS_CONFIG 0)
@@ -81,7 +81,6 @@ else()
         list(APPEND EXTRA_LIBS ${SSL_LIB})
         message(STATUS "Select ${SSL_NAME} as the SSL backend")
     else()
-	    set(SSL_NAME OFF)
 	    set(UHTTPD_SSL_SUPPORT_CONFIG 0)
     endif()
 endif()