This commit does not change script behavior, it only deals with code syntax and
standards:
* Long lines were capped to 80 chars
* Long commands were splited into multiple for improved readability
* Variables are now all using the curly brace syntax
Due to how stdin is read, the message gets a trailing "\n". sed was used to
remove it but this commit use shell variable mangling "${var%Pattern}"
instead (faster and nicer).
To simplify and improve readability of configuration options, use of standard
newline character is preferred over $NEWLINE_CHAR.
This commit uses \n in configuration options instead of $NEWLINE_CHAR and adds
a final \n to $NEWLINE_CHAR conversion step just prior to sending.
