Stamp HEAD as 10devel.

This is a good bit more complicated than the average new-version stamping
commit, because it includes various adjustments in pursuit of changing
from three-part to two-part version numbers.  It's likely some further
work will be needed around that change; but this is enough to get through
the regression tests, at least in Unix builds.

Peter Eisentraut and Tom Lane

src/interfaces/libpq/libpq.rc.in

@@ -1,8 +1,8 @@
 #include <winver.h>
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 9,6,0,0
- PRODUCTVERSION 9,6,0,0
+ FILEVERSION 10,0,0,0
+ PRODUCTVERSION 10,0,0,0
  FILEFLAGSMASK 0x3fL
  FILEFLAGS 0
  FILEOS VOS__WINDOWS32
@@ -15,13 +15,13 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "\0"
             VALUE "FileDescription", "PostgreSQL Access Library\0"
-            VALUE "FileVersion", "9.6.0\0"
+            VALUE "FileVersion", "10.0\0"
             VALUE "InternalName", "libpq\0"
             VALUE "LegalCopyright", "Copyright (C) 2016\0"
             VALUE "LegalTrademarks", "\0"
             VALUE "OriginalFilename", "libpq.dll\0"
             VALUE "ProductName", "PostgreSQL\0"
-            VALUE "ProductVersion", "9.6.0\0"
+            VALUE "ProductVersion", "10.0\0"
         END
     END
     BLOCK "VarFileInfo"