netapi32: Add some missing prototypes in the lmaccess.h, lmshare.h and lmwksta.h headers.

Replace LPWC?STR with LMC?STR to better match the PSDK.
diff --git a/dlls/netapi32/netapi32.c b/dlls/netapi32/netapi32.c
index a1cef9f..d095647 100644
--- a/dlls/netapi32/netapi32.c
+++ b/dlls/netapi32/netapi32.c
@@ -53,14 +53,14 @@
  *                NetServerEnum (NETAPI32.@)
  */
 NET_API_STATUS  WINAPI NetServerEnum(
-  LPCWSTR servername,
+  LMCSTR servername,
   DWORD level,
   LPBYTE* bufptr,
   DWORD prefmaxlen,
   LPDWORD entriesread,
   LPDWORD totalentries,
   DWORD servertype,
-  LPCWSTR domain,
+  LMCSTR domain,
   LPDWORD resume_handle
 )
 {
@@ -75,15 +75,15 @@
  *                NetServerEnumEx (NETAPI32.@)
  */
 NET_API_STATUS WINAPI NetServerEnumEx(
-    LPCWSTR ServerName,
+    LMCSTR ServerName,
     DWORD Level,
     LPBYTE *Bufptr,
     DWORD PrefMaxlen,
     LPDWORD EntriesRead,
     LPDWORD totalentries,
     DWORD servertype,
-    LPCWSTR domain,
-    LPCWSTR FirstNameToReturn)
+    LMCSTR domain,
+    LMCSTR FirstNameToReturn)
 {
     FIXME("Stub (%s %d %p %d %p %p %d %s %p)\n", debugstr_w(ServerName),
      Level, Bufptr, PrefMaxlen, EntriesRead, totalentries, servertype,
@@ -105,7 +105,7 @@
 /************************************************************
  *                NetStatisticsGet  (NETAPI32.@)
  */
-NET_API_STATUS WINAPI NetStatisticsGet(LPWSTR server, LPWSTR service,
+NET_API_STATUS WINAPI NetStatisticsGet(LMSTR server, LMSTR service,
                                        DWORD level, DWORD options,
                                        LPBYTE *bufptr)
 {