bintrans: replace the quoted printable encoder/decoder

[bapt]

Summary

Replace the quoted printable code with one that respects RFC2045
Add tests about this parsers and encoders, using examples from the
wikipedia page.

[pstef]

usr.bin/bintrans/Makefile

7

Would it be possible to not add a new file and just replace the old code in place?
Or completely throw the old quoted-printable.c away since you mentioned that you'd like to rewrite the encoder as well.

usr.bin/bintrans/qp.c

91

I recently played with getline() and I'm afraid that it's double-buffered.

[bapt]

Add the qp encoder

[lwhsu]

usr.bin/bintrans/qp.c

2

How about adding a SPDX header? BTW I'm not sure what license this file is, ISC or 0BSD?

usr.bin/bintrans/tests/bintrans_test.sh

2

Should a license header be added to this file?

[bapt]

remove useless comments

[bapt]

Address @pstef comments and change license for regular BSD 2 clause

[pstef]

usr.bin/bintrans/qp.c

5

was this really written during the reign of Septimius Severus?

40

nit: possibly move the return to the next line and indent

103

nit: surplus parentheses

111

nit: space

117

nit: space

125

nit: space

144

or just codec = encode ? encode_... : decode_...
to assign always only once.

[bapt]

Address @pstef comments

usr.bin/bintrans/qp.c

2

How about adding a SPDX header? BTW I'm not sure what license this file is, ISC or 0BSD?

the license here is MIT, is ISC as a huge part of the code comes from another project of mine, I can make it a standard BSD2 clause if you prefer

usr.bin/bintrans/tests/bintrans_test.sh

2

I can but I don't care, so if people prefer I make it the license one do prefer

[pstef]

usr.bin/bintrans/qp.c

32

nit: "string" sorts after "stdio".

145

nit: surplus space before ;