attempt to get unit tests working on cygwin

The change adds 'enable-dos2unix' build configuration option. After enabling
unit test in cygwin-like test worflow I could see `util/shlib_wrap.sh` fails
to run. One of the error was:
```
./../util/../util/shlib_wrap.sh: line 2: $'\r': command not found
```
It smells like some CRLF vsl LF (dos vs. unix) line terminators.
Looks like cygwin on windows is still sensitive to this.

The newly added `enable-dos2unix` makes sure all .sh/.pl scripts generated
at build time will have unix (LF) line end terminator. We use dos2unix
tool to convert generated script.

The cygwin windows workflow on github then should use option
`enable-dos2unix` if it plans to run unit tests. I could not
figure out how to do it in workflow only, therefore I'm alos
extending the OpenSSL build configuration.

.github/workflows/windows.yml

@@ -183,3 +183,67 @@ jobs:
 # Disable testing for now. TBD: Need local cygwin installation to debug .
 #    - name: Run openssl tests
 #      run: bash -c "cd openssl && make V=1 test"
+  mingw:
+    # Run a job for each of the specified target architectures:
+    # copied and modified from shared. Instead of installing nasm we
+    # install mingw and cygwin.
+    #
+    strategy:
+      matrix:
+        os:
+          - windows-2022
+        platform:
+          - arch: win64
+            config: enable-tests no-fips enable-dos2unix
+    runs-on: ${{ github.server_url == 'https://github.com' && matrix.os || format('{0}-self-hosted', matrix.os) }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cygwin/cygwin-install-action@master
+      with:
+         packages: perl git make gcc-core gcc dos2unix
+    - name: Check repo
+      run: cygcheck -V
+    - name: Full cygcheck status
+      run: cygcheck -s -v -r -h
+    - name: Install MinGW
+      uses: egor-tensin/setup-mingw@v2
+      with:
+        platform: x64
+        cygwin: 1
+    - name: prepare the build directory
+      run: mkdir _build
+    - name: config
+      working-directory: _build
+      run: |
+         bash -c "gcc --version && perl ../Configure ${{ matrix.platform.config }}"
+         bash -c "perl configdata.pm --dump"
+    - name: build
+      working-directory: _build
+      run: |
+         bash -c  "make -j 4"
+    - name: download coreinfo
+      uses: suisei-cn/actions-download-file@v1.6.0
+      with:
+        url: "https://download.sysinternals.com/files/Coreinfo.zip"
+        target: _build/coreinfo/
+    - name: get cpu info
+      working-directory: _build
+      continue-on-error: true
+      run: |
+        7z.exe x coreinfo/Coreinfo.zip
+        ./Coreinfo64.exe -accepteula -f
+        ./apps/openssl.exe version -c
+    - name: Check platform symbol usage
+      working-directory: _build
+      run: perl ../util/checkplatformsyms.pl ../util/platform_symbols/windows-symbols.txt libcrypto-3-x64.dll ./libssl-3-x64.dll
+    - name: test
+      working-directory: _build
+      run: |
+         bash -c "make test HARNESS_JOBS=4"
+    - name: save artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: "ci@-${{ matrix.os }}"
+        path: _build
+        if-no-files-found: ignore
+        retention-days: 2

Configurations/unix-Makefile.tmpl

@@ -2011,13 +2011,17 @@ EOF
       my $dofile = abs2rel(rel2abs(catfile($config{sourcedir},
                                            "util", "dofile.pl")),
                            rel2abs($config{builddir}));
-      return <<"EOF";
-$script: $sources configdata.pm
-	\$(RM) "$script"
-	\$(PERL) "-I\$(BLDDIR)" -Mconfigdata "$dofile" \\
-	    "-o$target{build_file}" $sources > "$script"
-	chmod a+x $script
-EOF
+      my $rv;
+      $rv .= "$script: $sources configdata.pm\n";
+      $rv .= "\t\$(RM) \"$script\"\n";
+      $rv .= "\t\$(PERL) \"-I\$(BLDDIR)\" -Mconfigdata \"$dofile\" \\\n";
+      $rv .= "\t    \"-o$target{build_file}\" $sources > \"$script\"\n";
+#      if ($config{dos2unix} == 1 && $script =~ /.+\.sh$/) {
+      if ($config{dos2unix} == 1) {
+          $rv .= "\tdos2unix $script \n";
+      }
+      $rv .= "\tchmod a+x $script\n";
+      return $rv;
   }
   sub generatedir {
       my %args = @_;

Configure

@@ -455,6 +455,7 @@ my @disablables = (
     "dgram",
     "dh",
     "docs",
+    "dos2unix",
     "dsa",
     "dso",
     "dtls",
@@ -865,6 +866,10 @@ while (@argvcopy)
                         $unsupported_options{$_} = 1;
                         next;
                         }
+                elsif ($word =~ /dos2unix/)
+                        {
+		        $config{dos2unix} = 1; # .sh scripts on cygwin windows needs to be converted to unix form
+                        }
                 }
         if (/^no-(.+)$/ || /^disable-(.+)$/)
                 {