Merge remote-tracking branch 'tls/development' into development

Resolve merge conflicts by performing the following actions:

- Reject changes to deleted files.
- Reject changes to generate_errors.pl and generate_visualc_files.pl.
  Don't add an 'include-crypto' option which would attempt to use the
  non-existent crypto submodule.
- list-identifiers.sh had the `--internal` option added to it, which
  lists identifiers only in internal headers. Add PSA-specific internal
  headers to list-identifiers.sh.

* origin/development: (40 commits)
  Document the scripts behaviour further
  Use check_output instead of Popen
  all.sh: Require i686-w64-mingw32-gcc version >= 6
  generate_visualc_files.pl: add mbedtls source shadowing by crypto
  generate_errors.pl: refactor and simplify the code
  Start unused variable with underscore
  Correct documentation
  generate_errors.pl: typo fix
  revert changes to generate_features.pl and generate_query_config.pl
  Check that the report directory is a directory
  Use namespaces instead of full classes
  Fix pylint issues
  Don't put abi dumps in subfolders
  Add verbose switch to silence all output except the final report
  Fetch the remote crypto branch, rather than cloning it
  Prefix internal functions with underscore
  Add RepoVersion class to make handling of many arguments easier
  Reduce indentation levels
  Improve documentation
  Use optional arguments for setting repositories
  ...
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index badbd97..b38c7d4 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1004,6 +1004,12 @@
     make CC=i686-w64-mingw32-gcc AR=i686-w64-mingw32-ar LD=i686-w64-minggw32-ld CFLAGS='-Werror -Wall -Wextra' WINDOWS_BUILD=1 SHARED=1 tests
     make WINDOWS_BUILD=1 clean
 }
+support_build_mingw() {
+    case $(i686-w64-mingw32-gcc -dumpversion) in
+        [0-5]*) false;;
+        *) true;;
+    esac
+}
 
 component_test_memsan () {
     msg "build: MSan (clang)" # ~ 1 min 20s
diff --git a/tests/scripts/list-identifiers.sh b/tests/scripts/list-identifiers.sh
index ccd488c..eaf270c 100755
--- a/tests/scripts/list-identifiers.sh
+++ b/tests/scripts/list-identifiers.sh
@@ -1,4 +1,10 @@
-#!/bin/sh
+#!/bin/bash
+#
+# Create a file named identifiers containing identifiers from internal header
+# files or all header files, based on --internal flag.
+# Outputs the line count of the file to stdout.
+#
+# Usage: list-identifiers.sh [ -i | --internal ]
 
 set -eu
 
@@ -7,7 +13,29 @@
     exit 1
 fi
 
-HEADERS=$( ls include/mbedtls/*.h include/psa/*.h library/*.h | egrep -v 'compat-1\.3\.h|bn_mul' )
+INTERNAL=""
+
+until [ -z "${1-}" ]
+do
+  case "$1" in
+    -i|--internal)
+      INTERNAL="1"
+      ;;
+    *)
+      # print error
+      echo "Unknown argument: '$1'"
+      exit 1
+      ;;
+  esac
+  shift
+done
+
+if [ $INTERNAL ]
+then
+    HEADERS=$( ls include/mbedtls/*_internal.h library/*.h | egrep -v 'compat-1\.3\.h|bn_mul' )
+else
+    HEADERS=$( ls include/mbedtls/*.h include/psa/*.h library/*.h | egrep -v 'compat-1\.3\.h|bn_mul' )
+fi
 
 rm -f identifiers