[regress/agent.sh regress/keytype.sh regress/cfgmatch.sh regress/forcecommand.sh regress/proto-version.sh regress/test-exec.sh regress/cipher-speed.sh regress/cert-hostkey.sh regress/cert-userkey.sh regress/ssh-com.sh] replace 'echo -n' with 'printf' since it's more portable also remove "echon" hack.
regress/test-exec.sh] Handle different was of echoing without newlines.