Address code review comments

CMakeLists.txt

@@ -29,7 +29,7 @@ option(use_builtin_httpapi "set use_builtin_httpapi to ON to use the built-in ht
 option(use_cppunittest "set use_cppunittest to ON to build CppUnitTest tests on Windows (default is OFF)" OFF)
 option(suppress_header_searches "do not try to find headers - used when compiler check will fail" OFF)
 option(use_custom_heap "use externally defined heap functions instead of the malloc family" OFF)
-option(no_openssl_engine "Disables the use of ENGINEs in OpenSSL, if the target version supports it" OFF)
+option(no_openssl_engine "Disables the use of ENGINEs in OpenSSL" OFF)
 
 if(${use_custom_heap})
     add_definitions(-DGB_USE_CUSTOM_HEAP)
@@ -121,6 +121,9 @@ if(${use_openssl})
         find_package(OpenSSL REQUIRED)
     endif()
 
+    # The block below enables the v1 back-compatibility layer in OpenSSL 3,
+    # if using that version or later. For reference, please check the OpenSSL
+    # official documentation: https://www.openssl.org/docs/man3.0/man7/openssl_user_macros.html
     if (DEFINED OPENSSL_VERSION AND (${OPENSSL_VERSION} GREATER_EQUAL 3))
         add_definitions(-DOPENSSL_API_COMPAT=0x10101000L)
     endif()