Move decode_hex into its own file

- Error detection against strotul(3) has been improved, as done in other
places.
- New function encode_hex has been implemented, which will be used
by future commits.

1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index fc00b3a..517959c 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,7 @@ OBJECTS = \
 	base64.o \
 	cftw.o \
 	handler.o \
+	hex.o \
 	html.o \
 	http.o \
 	jwt.o \