portable: include worktree_open Make worktree_open part of the build.

portable: update to handle bloom, etc Update portable to support changes for bloom, etc.

portable: propagate AM_CFLAGS/AM_CPPFLAGS Allow for warnings via AM_CFLAGS in a common Makefile, and let those values propagate to all other Makefiles. Currently the more useful checks are disabled until upstream changes are made to reduce warnings. While here, also fix the version string to remove quotes.

libexec: honour libeexec path for helpers libexec is a common path which is understood by autotools, and should be honoured. Patch from Christian "naddy" Weisgerber

portable: add FreeBSD support This adds the capability to compile got-portable on FreeBSD.

dist: rework files for distcheck Rather than having a toplevel EXTRA_DIST target in the toplevel Makefile.am file, move the relevant files to their own Makefile.am locations.

automake: Fix path to libexec directory The got_lib_privsep.h header expects the path to the libexec directory to be called GOT_LIBEXECDIR. At the moment it always falls back to using /usr/libexec. Fix what looks to be a typo.

ncurses: only look for widechar version When checking for ncurses, only check against the widechar version of the library, otherwise the code won't work correctly, despite it compiling properly. Helped by Thomas Dickey.

portable: initial Linux compilation This commit modifies the GoT main branch to be able to compile it under linux.