Tentatively add support for UWIN, a Unix-like environment on top of Windows.

PR: 62

Configure

@@ -509,6 +509,9 @@ my %table=(
 # and its library files in util/pl/*)
 "Mingw32", "gcc:-DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall:::::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::win32",
 
+# UWIN 
+"UWIN", "cc:-DTERMIOS -DL_ENDIAN -O -Wall:::UWIN::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::win32",
+
 # Cygwin
 "Cygwin-pre1.3", "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall::(unknown):CYGWIN32::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}::::::::::win32",
 "Cygwin", "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall:::CYGWIN32::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_out_asm}:win32:cygwin-shared:::.dll",

e_os2.h

@@ -90,17 +90,22 @@ extern "C" {
 
 /* For 32 bit environment, there seems to be the CygWin environment and then
    all the others that try to do the same thing Microsoft does... */
-#if defined(__CYGWIN32__) || defined(OPENSSL_SYSNAME_CYGWIN32)
+#if defined(OPENSSL_SYSNAME_UWIN)
 # undef OPENSSL_SYS_UNIX
-# define OPENSSL_SYS_WIN32_CYGWIN
+# define OPENSSL_SYS_WIN32_UWIN
 #else
-# if defined(_WIN32) || defined(OPENSSL_SYSNAME_WIN32)
+# if defined(__CYGWIN32__) || defined(OPENSSL_SYSNAME_CYGWIN32)
 #  undef OPENSSL_SYS_UNIX
-#  define OPENSSL_SYS_WIN32
-# endif
-# if defined(OPENSSL_SYSNAME_WINNT)
-#  undef OPENSSL_SYS_UNIX
-#  define OPENSSL_SYS_WINNT
+#  define OPENSSL_SYS_WIN32_CYGWIN
+# else
+#  if defined(_WIN32) || defined(OPENSSL_SYSNAME_WIN32)
+#   undef OPENSSL_SYS_UNIX
+#   define OPENSSL_SYS_WIN32
+#  endif
+#  if defined(OPENSSL_SYSNAME_WINNT)
+#   undef OPENSSL_SYS_UNIX
+#   define OPENSSL_SYS_WINNT
+#  endif
 # endif
 #endif