Fix warnings compiling in maintainer mode.
Install DB/common.php and DB/mysql.php on "make install".
# We still have a warning from http_config.h:97. Rasmus? :-)
* Changed PHP4 to compile as a DLL, both ISAPI and the the CGI run with the same DLL.
* Switched to using the DLL runtime library under Win32. PHP will NOT work if
compiled against the static library!
* Removed yesterday's php4libts project (with php4dllts, it's obsolete).
This *does* affect thread-unsafe Windows as well - the thread unsafe CGI is also
dependant on the thread-unsafe DLL.