Reconcile e2fsprogs ./. krb5-* conflicts.

• Move conflicting e2fsprogs headers & libs into .../e2fsprogs/... subdirs.
• Move conflicting awk scripts into ${DATADIR}.
• Rename and patch compile_et to e2fsprogs-compile_et.
• Remove conflict markers (from e2fsprogs and krb5-*).
• Add CPPFLAGS/LDFLAGS to sysutils/fusefs-ext2, including --rpath setting.

While here, also:

• sort pkg-plist and files/unwanted
• use FUSEFS_CONFIGURE_ENABLE=fuse2fs to prevent e2fsprogs from picking up fusefs (implies --disable-fuse2fs if the option remains disabled)
• add --without-included-gettext to CONFIGURE_ARGS just to be on the safe side.

And of course, bump PORTREVISION to 3 in e2fsprogs. Since other ports
do not change files or runtime behaviour, their PORTREVISION remains
untouched.