security/gnutls: Add KTLS option and a few improvements
- Switch to DISTFILES
- Do some light rearrangement of Makefile for better readability and consistency
- Remove --disable-guile from CONFIGURE_ARGS
- Add --without-included-libtasn1 to CONFIGURE_ARGS
- Add KTLS option https://lists.gnupg.org/pipermail/gnutls-help/2023-November/004837.html See also https://gnutls.org/manual/html_node/Enabling_002fDisabling-system_002facceleration-protocols.html#Enabling-KTLS
PR: 278083
Reviewed by: tijl