Fix up NT slapd.dsp and nt_svc.c so that slapd builds under MSVC5.

servers/slapd/nt_svc.c

@@ -40,7 +40,7 @@ char *GetLastErrorString( void );
 int srv_install( char* service, char* filename );
 int srv_remove ( char* service, char* filename );
 
-void nt_main( DWORD argc, LPTSTR *argv )
+void main( DWORD argc, LPTSTR *argv )
 {
 	int		length;
 	char	filename[MAX_PATH], *fname_start;

servers/slapd/slapd.dsp

@@ -147,6 +147,10 @@ SOURCE=.\main.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\nt_svc.c
+# End Source File
+# Begin Source File
+
 SOURCE=".\proto-slap.h"
 # End Source File
 # Begin Source File