All tables use the compact format now, and we generate
caches in that format too. Bump the cache version to 3
for this.
Replace the python script for generating the builtin table
by a small C program using the same code to generate the data
for the builtin table. This drops the restriction on only
generating a single character in the builtin sequences.
This was breaking muscle memory of people with
the us intl keyboard layout, for important keys
such as '. The unfortunate side-effect is that
our handling of <dead_acute> is a bit hampered
by sequences that don't fit the pattern. But
such is life.
Fixes: #3807
Update our compose sequences based on the current
update xorg Compose.pre file. Beyond that, remove
some deadkey sequences that we are now handling
(better) in code.
