Merge pull request #6900 from raffenet/4.2.0-ga

doc: Update version in preparation of 4.2.0 GA

Approved-by: Hui Zhou <hzhou321@anl.gov>
Approved-by: Yanfei Guo <yguo@anl.gov>

CHANGES

@@ -1,5 +1,5 @@
 ===============================================================================
-                               Changes in 4.2
+                               Changes in 4.2.0
 ===============================================================================
 # Complete support MPI 4.1 specification
 

maint/version.m4

@@ -14,7 +14,7 @@
 # changing this by playing with diversions, but then we would probably be
 # playing with autotools-fire.
 
-m4_define([MPICH_VERSION_m4],[4.2.0rc3])dnl
+m4_define([MPICH_VERSION_m4],[4.2.0])dnl
 m4_define([MPICH_RELEASE_DATE_m4],[unreleased development copy])dnl
 
 # For libtool ABI versioning rules see:
@@ -36,6 +36,7 @@ m4_define([MPICH_RELEASE_DATE_m4],[unreleased development copy])dnl
 # standard, and does not include MPIX_ functions and C++ bindings.
 
 # Use [0:0:0] for unstable (e.g. alpha and beta) releases.
+# last version: 4.2.0 - 16:0:4
 
 m4_define([libmpi_so_version_m4],[0:0:0])dnl