* environ.cc (_addenv): malloc space for setenv if cygwin1.dll is used in

conjunction with older binaries.
(environ_init): Ditto.
* external.cc (get_cygdrive_info): New function.
* external.cc (get_cygdrive_prefixes): Change to use get_cygdrive_info but toss
the user and system flags.
* external.cc (cygwin_internal): Add new CW_GET_CYGDRIVE_INFO case.
* path.cc (mount_info::get_cygdrive_prefixes): Remove method.
* path.cc (mount_info::get_cygdrive_info): New method.  Actually,
get_cygdrive_info is really an enhanced version of get_cygdrive_prefixes
renamed to get_cygdrive_info that also gets the user and system flags.
* shared_info.h (get_cygdrive_prefixes): Remove method.
* shared_info.h (get_cygdrive_info): New method.
* include/cygwin/version.h: Bump minor API version due to adding
CW_GET_CYGDRIVE_INFO to cygwin_internal.
* include/sys/cygwin.h (cygwin_getinfo_types): Add CW_GET_CYGDRIVE_INFO.

winsup/cygwin/include/cygwin/version.h

@@ -72,6 +72,7 @@ details. */
   (CYGWIN_VERSION_DLL_MAKE_COMBINED (user_data->api_major, user_data->api_minor) <= \
   CYGWIN_VERSION_DLL_OLD_TERMIOS)
 
+#define CYGWIN_VERSION_DLL_MALLOC_ENV		28
      /* Old APIs had getc/putc macros that conflict with new CR/LF
 	handling in the stdio buffers */
 #define CYGWIN_VERSION_OLD_STDIO_CRLF_HANDLING \
@@ -119,10 +120,11 @@ details. */
        27: CW_GETPINFO_FULL addition to external.cc
        28: Accidentally bumped by cgf
        29: Export hstrerror
+       30: CW_GET_CYGDRIVE_INFO addition to external.cc
      */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 29
+#define CYGWIN_VERSION_API_MINOR 30
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible