Reimplement FastCGI interface

Due to licensing restrictions that actually don't allow anybody to use
the libfcgi code without prior approval from Open Market, which is
impossible to obtain - we decided to reimplement this interface from
scratch.  The result is actually slightly faster, and more importantly,
clear of any copyright issues.

Implementation by Dmitry

sapi/cgi/cgi_main.c

@@ -78,9 +78,8 @@
 
 #include "php_getopt.h"
 
-#include "fcgi_config.h"
-#include "fcgiapp.h"
-/* don't want to include fcgios.h, causes conflicts */
+#include "fastcgi.h"
+
 #ifdef PHP_WIN32
 extern int OS_SetImpersonate(void);
 #else

sapi/cgi/config.w32

@@ -4,7 +4,6 @@
 ARG_ENABLE('cgi', 'Build CGI version of PHP', 'yes');
 
 if (PHP_CGI == "yes") {
-	SAPI('cgi', 'cgi_main.c getopt.c', 'php-cgi.exe', '/I sapi/cgi/libfcgi/include /D FCGI_STATIC');
-	ADD_SOURCES('sapi/cgi/libfcgi', 'fcgi_stdio.c fcgiapp.c os_win32.c', 'cgi');
+	SAPI('cgi', 'cgi_main.c getopt.c fastcgi.c', 'php-cgi.exe');
 	ADD_FLAG('LIBS_CGI', 'ws2_32.lib kernel32.lib advapi32.lib');
 }

sapi/cgi/config9.m4

@@ -45,6 +45,32 @@ if test "$PHP_SAPI" = "default"; then
   if test "$PHP_SAPI_CGI" != "no"; then
     AC_MSG_RESULT(yes)
 
+    AC_MSG_CHECKING([for socklen_t in sys/socket.h])
+    AC_EGREP_HEADER([socklen_t], [sys/socket.h],
+      [AC_MSG_RESULT([yes])
+       AC_DEFINE([HAVE_SOCKLEN_T], [1],
+        [Define if the socklen_t typedef is in sys/socket.h])],
+      AC_MSG_RESULT([no]))
+
+    AC_MSG_CHECKING([for sun_len in sys/un.h])
+    AC_EGREP_HEADER([sun_len], [sys/un.h],
+      [AC_MSG_RESULT([yes])
+       AC_DEFINE([HAVE_SOCKADDR_UN_SUN_LEN], [1],
+        [Define if sockaddr_un in sys/un.h contains a sun_len component])],
+      AC_MSG_RESULT([no]))
+
+    AC_MSG_CHECKING([whether cross-process locking is required by accept()])
+    case "`uname -sr`" in
+      IRIX\ 5.* | SunOS\ 5.* | UNIX_System_V\ 4.0)	
+        AC_MSG_RESULT([yes])
+        AC_DEFINE([USE_LOCKING], [1], 
+          [Define if cross-process locking is required by accept()])
+      ;;
+      *)
+        AC_MSG_RESULT([no])
+      ;;
+    esac
+
     PHP_ADD_MAKEFILE_FRAGMENT($abs_srcdir/sapi/cgi/Makefile.frag)
     case $host_alias in
       *cygwin* )
@@ -58,11 +84,8 @@ if test "$PHP_SAPI" = "default"; then
 
     PHP_TEST_WRITE_STDOUT
 
-    PHP_ADD_BUILD_DIR($abs_builddir/sapi/cgi/libfcgi)
-    PHP_FCGI_INCLUDE="-I$abs_srcdir/sapi/cgi/libfcgi/include"
-
     INSTALL_IT="@echo \"Installing PHP CGI into: \$(INSTALL_ROOT)\$(bindir)/\"; \$(INSTALL) -m 0755 \$(SAPI_CGI_PATH) \$(INSTALL_ROOT)\$(bindir)/\$(program_prefix)php\$(program_suffix)\$(EXEEXT)"
-    PHP_SELECT_SAPI(cgi, program, libfcgi/fcgi_stdio.c libfcgi/fcgiapp.c libfcgi/os_unix.c cgi_main.c getopt.c, $PHP_FCGI_INCLUDE, '$(SAPI_CGI_PATH)')
+    PHP_SELECT_SAPI(cgi, program, fastcgi.c cgi_main.c getopt.c, '', '$(SAPI_CGI_PATH)')
 
     case $host_alias in
       *aix*)