Original patch from Omar Polo. Tweak by me.

These wrappers aren't used in -portable. From Omar Polo.

Update EXTRA_DIST to include these two files.

libbsd-overlay needs to be declared properly with the correct AM_CFLAGS, but this only happens via a common Makefile.common.in template which gets filled out at ./configure time. This properly ensures libbsd compat libraries, such as getprogname() are correctly found on the system.

Fixes, for example, a few warnings on GNU systems where -D_GNU_SOURCE needs to be used for asprintf(3) visibility. Patch by Anna Vyalkova, thanks!

fixes send.sh test fallout on arm64 and should also fix i386 ok op@

This adds a set of functions to abstract over SHA1Init, SHA1Update, SHA1Final, their respective SHA256 variants and how to compare digests. Replace all the SHA1*() usage with the new APIs. It's a preparatory step for sha256 handling. ok stsp@

Add compatability support for sha2 for systems which don't natively have it. This has been stolen from OpenBSD. Thanks!

fixes send.sh test fallout on arm64 and should also fix i386 ok op@

ok op

This adds a set of functions to abstract over SHA1Init, SHA1Update, SHA1Final, their respective SHA256 variants and how to compare digests. Replace all the SHA1*() usage with the new APIs. It's a preparatory step for sha256 handling. ok stsp@

Don't rely on AC_RUN_IFELSE as this breaks cross-compilation (voidlinux). Although this is better replaced with AC_CHECK_DECL. In template/ include checking for libbsd.