patch 8.1.0084: user name completion does not work on MS-Windows

Problem:    User name completion does not work on MS-Windows.
Solution:   Use NetUserEnum() to get user names. (Yasuhiro Matsumoto)
diff --git a/src/Make_ivc.mak b/src/Make_ivc.mak
index d90477c..c8c1c2f 100644
--- a/src/Make_ivc.mak
+++ b/src/Make_ivc.mak
@@ -88,7 +88,7 @@
 CPP_PROJ= /nologo /MT /W3 /GX /I ".\proto" /D "WIN32" /c
 # ADD CPP /nologo /MT /W3 /GX /I ".\proto" /D "WIN32" /c
 
-LINK32_FLAGS= oldnames.lib kernel32.lib user32.lib gdi32.lib version.lib comdlg32.lib comctl32.lib advapi32.lib shell32.lib ole32.lib uuid.lib /nologo /machine:I386 /nodefaultlib
+LINK32_FLAGS= oldnames.lib kernel32.lib user32.lib gdi32.lib version.lib comdlg32.lib comctl32.lib advapi32.lib shell32.lib ole32.lib netapi32.lib uuid.lib /nologo /machine:I386 /nodefaultlib
 # ADD LINK32  oldnames.lib kernel32.lib user32.lib gdi32.lib version.lib comdlg32.lib comctl32.lib advapi32.lib shell32.lib ole32.lib uuid.lib /nologo /machine:I386 /nodefaultlib
 # SUBTRACT LINK32 /incremental:yes