wiki CassandraLimitations page mention of random data crash

[Ted Zlatanov]

I propose an edit to the wiki page

http://wiki.apache.org/cassandra/CassandraLimitations

as follows:

"Vulnerability to random data

Cassandra will crash if you send random data to the Thrift API.  See
https://issues.apache.org/jira/browse/CASSANDRA-475 and
https://issues.apache.org/jira/browse/THRIFT-601 for details."

It can be edited out when it's no longer true, but I think it's an
important limitation.

Ted