added value check for TC_UNREASON

 replace undisplayable characters with '?' in the payload field

 added value check for TC_ESCNULL

 keep control characters escaped

 renamed the newly validated tests

 fixed the position of From/To/Contact parameters

 fixed non-matching of url parameters when there are multiple parameters

 fixed value check for TC_BADBRANCH

 fixed matching urls containing [?,;] but which are not enclosed in <>

 added value check for TC_REGESCRT

 added value check for TC_ESCRURI

 added value check for TC_ESC02

 support matching escaped characters in header names

 do not remove escape sequences in non-generic parameters of via

 fixed value check in TC_SEMIURI with correct escaped string

 transformed TC_REGBADCT into a negative test

 added value check for TC_ESC01

 added a function to decode and normalise the escaped characters

 renamed the positive tortture testcases

 fixed TC_LONGREQ to remove double-quotes in the nameaddr field

 allow returning an undecoded value in TC_SCALAR* (all we need is a codec that does not crash)

 support for decoding quoted strings

 added function for normalising quoted strings
 
 TODO: how to represent unicode characters ?

 added value check for TC_SEMIURI

 renamed negative testcases

 added value check for TC_REGBADCT

 fixed the content of the message in TC_MPART01

 transformed TC_INV2543 into a negative test

 disabled TC_DBLREQ because it is not a codec issue

 transformed TC_CLERR into a negative test

 added value check for TC_BADVERS

 added value check for TC_BADDATE

 added value check for TC_BADBRANCH

 added the remaining torture testcases

 changed TC_NCL into a negative test

 use the value of the Content-Length as a prediction when decoding the message body to ensure that the content length does not mismatch

 throw a DecodeIgnoreMessage after displaying the error message so that the toolkit does not output anything

 improved the messages displayed

 dump a warning and the raw message if the codec is unable to decode a message

 updated the torture tests to handle the raw message in the payload field