Public bug reported:

When setting the value for repl.proto_max and repl.max_ws_size, setting
the value to an invalid or overflow value will crash.

These two variables are parsed in the constructor for
galera::ReplicatorSMM, thus if the parse of the option fails an
exception is thrown, which then causes the system to abort (with no
helpful message).

Repro:
    Set "wsrep_provider_options=repl.proto_max=1125899906842624"

Expect:
expect this not to crash, I would expect an error message and maybe setting the 
value to the max/min value.

** Affects: galera-3 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1603829

Title:
   Galera crashes with INVALID/OVERFLOW values for repl.proto_max and
  repl.max_ws_size

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