Base 3.15.4-rc1 available

[Ralph Lange <ralph.lange@gmx.de>]

Dear all,

Base 3.15.4-rc1 has been prepared and is available for download and 
testing. [1]
Thanks to the help of additional testers that responded to the call on 
tech-talk, we were able to fix almost all issues that showed up in -pre1.
However, there is one known issue in -rc1 that we haven't been able to 
fix yet:
In some cases, CA clients that are shutting down are producing core 
dumps (segmentation faults) and/or show C++ exceptions. This seems to 
happen in configurations that show duplicate PVs (e.g. multiple network 
interfaces) when the reverse DNS lookups (number to name) are slow, for 
clients that have a short life span (e.g. command line caget).
This issue will be fixed before the final 3.15.4 is released, but it is 
not critical enough to hold up the release candidate.
Thanks a lot to everyone who helped!

Cheers,
~Ralph

[1] https://launchpad.net/epics-base/3.15/3.15.4