build: add Debug, TrackMemory, ECH to feature list

Also:

- remove stray `ECH` and `HTTPSRR` from cmake protocol list.

- stop excluding `Debug` and `TrackMemory` in `test1013.pl`.

- configure: delete `CURL_CHECK_CURLDEBUG` check.
  Ref: 065047dc62
  This check was effectively doing nothing, except disabling
 `--enable-curldebug` in `curl-config` for
 Cygwin/MSYS/cegcc/OS2/AIX targets with c-ares enabled.

Closes #14096

CMakeLists.txt

@@ -1667,8 +1667,6 @@ if(NOT CURL_DISABLE_INSTALL)
   _add_if("IPFS"          NOT CURL_DISABLE_HTTP)
   _add_if("IPNS"          NOT CURL_DISABLE_HTTP)
   _add_if("HTTPS"         NOT CURL_DISABLE_HTTP AND SSL_ENABLED)
-  _add_if("ECH"           HAVE_ECH)
-  _add_if("HTTPSRR"       HAVE_ECH)
   _add_if("FTP"           NOT CURL_DISABLE_FTP)
   _add_if("FTPS"          NOT CURL_DISABLE_FTP AND SSL_ENABLED)
   _add_if("FILE"          NOT CURL_DISABLE_FILE)
@@ -1741,6 +1739,9 @@ if(NOT CURL_DISABLE_INSTALL)
   _add_if("threadsafe"    HAVE_ATOMIC OR
                           (USE_THREADS_POSIX AND HAVE_PTHREAD_H) OR
                           (WIN32 AND HAVE_WIN32_WINNT GREATER_EQUAL 0x600))
+  _add_if("Debug"         ENABLE_DEBUG)
+  _add_if("TrackMemory"   ENABLE_CURLDEBUG)
+  _add_if("ECH"           SSL_ENABLED AND HAVE_ECH)
   _add_if("PSL"           USE_LIBPSL)
   if(_items)
     if(NOT CMAKE_VERSION VERSION_LESS 3.13)

configure.ac

@@ -549,8 +549,6 @@ CURL_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE
 CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH
 CURL_CHECK_COMPILER_SYMBOL_HIDING
 
-CURL_CHECK_CURLDEBUG
-
 supports_unittests=yes
 # cross-compilation of unit tests static library/programs fails when
 # libcurl shared library is built. This might be due to a libtool or
@@ -4817,6 +4815,12 @@ else
   AC_MSG_RESULT([no])
 fi
 
+if test "x$OPENSSL_ENABLED" = "x1" -o -n "$SSL_ENABLED"; then
+  if test "x$ECH_ENABLED" = "x1"; then
+    SUPPORT_FEATURES="$SUPPORT_FEATURES ECH"
+  fi
+fi
+
 if test ${ac_cv_sizeof_curl_off_t} -gt 4; then
   if test ${ac_cv_sizeof_off_t} -gt 4 -o \
      "$curl_win32_file_api" = "win32_large_files"; then
@@ -4844,6 +4848,13 @@ else
   ])
 fi
 
+if test "x$want_debug" = "xyes"; then
+  SUPPORT_FEATURES="$SUPPORT_FEATURES Debug"
+fi
+if test "x$want_curldebug" = "xyes"; then
+  SUPPORT_FEATURES="$SUPPORT_FEATURES TrackMemory"
+fi
+
 dnl replace spaces with newlines
 dnl sort the lines
 dnl replace the newlines back to spaces

m4/curl-compilers.m4

@@ -1248,52 +1248,6 @@ squeeze() {
 ])
 
 
-dnl CURL_CHECK_CURLDEBUG
-dnl -------------------------------------------------
-dnl Settings which depend on configure's curldebug given
-dnl option, and other additional configure pre-requisites.
-dnl Actually the curl debug memory tracking feature can
-dnl only be used/enabled when libcurl is built as a static
-dnl library or as a shared one on those systems on which
-dnl shared libraries support undefined symbols.
-
-AC_DEFUN([CURL_CHECK_CURLDEBUG], [
-  AC_REQUIRE([XC_LIBTOOL])dnl
-  AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl
-  supports_curldebug="unknown"
-  if test "$want_curldebug" = "yes"; then
-    if test "x$enable_shared" != "xno" &&
-      test "x$enable_shared" != "xyes"; then
-      AC_MSG_WARN([unknown enable_shared setting.])
-      supports_curldebug="no"
-    fi
-    if test "x$enable_static" != "xno" &&
-      test "x$enable_static" != "xyes"; then
-      AC_MSG_WARN([unknown enable_static setting.])
-      supports_curldebug="no"
-    fi
-    if test "$supports_curldebug" != "no"; then
-      if test "$enable_shared" = "yes" &&
-        test "x$xc_lt_shlib_use_no_undefined" = 'xyes'; then
-        supports_curldebug="no"
-        AC_MSG_WARN([shared library does not support undefined symbols.])
-      fi
-    fi
-  fi
-  #
-  if test "$want_curldebug" = "yes"; then
-    AC_MSG_CHECKING([if curl debug memory tracking can be enabled])
-    test "$supports_curldebug" = "no" || supports_curldebug="yes"
-    AC_MSG_RESULT([$supports_curldebug])
-    if test "$supports_curldebug" = "no"; then
-      AC_MSG_WARN([cannot enable curl debug memory tracking.])
-      want_curldebug="no"
-    fi
-  fi
-])
-
-
-
 dnl CURL_CHECK_COMPILER_HALT_ON_ERROR
 dnl -------------------------------------------------
 dnl Verifies if the compiler actually halts after the

tests/libtest/test1013.pl

@@ -44,9 +44,6 @@ close CURL;
 $curl_protocols =~ s/\r//;
 $curl_protocols =~ /\w+: (.*)$/;
 @curl = split / /,$1;
-
-# These features are not supported by curl-config
-@curl = grep(!/^(Debug|TrackMemory)$/i, @curl);
 @curl = sort @curl;
 
 # Read the output of curl-config