Merge pull request #7911 from bwbarrett/dist/v4.1.x

Prep for v4.1.0rc1 release

NEWS

@@ -60,6 +60,12 @@ included in the vX.Y.Z section and be denoted as:
 4.1.0 -- July, 2020
 -------------------
 
+- runtime: fix situation where rank-by argument does not work
+- Portals4: Clean up error handling corner cases
+- runtime: Remove --enable-install-libpmix option, which has not
+  worked since it was added
+- UCX: Allow UCX 1.8 to be used with the btl uct
+- OMPIO: Add support for the IME file system
 - OFI/libfabric: Added support for multiple NICs
 - OFI/libfabric: Added support for Scalable Endpoints
 - OFI/libfabric: Added btl for one-sided support

VERSION

@@ -32,7 +32,7 @@ release=0
 # requirement is that it must be entirely printable ASCII characters
 # and have no white space.
 
-greek=a1
+greek=rc1
 
 # If repo_rev is empty, then the repository version number will be
 # obtained during "make dist" via the "git describe --tags --always"