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This reverts commit b8f5841a88b1d08fcb58167464a7f57c5dbdf7bd.
Added support for flags to bashsshrc.
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Added traps to cleanup on failure.
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bashsshrc: exec bash so we don't fork a new shell

When running with SHELL=$SSHHOME/bassshrc we have problems
with certain programs like 'less' and 'mc'.

These programs like 'less' and 'mc' like to interact directly with
the $SHELL process with pipes and wait for pids.  When we fork from
bashsshrc these programs are unable to monitor the subshell and will
hang.

To prevent this and more properly we should exec bash so that we replace
the bashsshrc process with the new shell directly.

Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
Merge pull request #20 from rbbratta/exec_bash

bashsshrc: exec bash so we don't fork a new shell
/etc/motd is catted if present.
Changed `which sshrc` to $0.
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Changed xxd -ps to equivalent xxd -p.
Removed buggy brew install from README.
upstream updates