low urgency: glyph name suffixes

As discussed: at the moment, there is a good number of glyph name suffixes which are not immediately self-explanatory – here is a selection:

```
0
zero.0

0p
zero.0p

0ps
zero.0ps

0s
zero.0s

a
I.a, Igrave.a, Iacute.a, Icircumflex.a, Idieresis.a, Imacron.a, Idotaccent.a, Iogonek.a, a.a, agrave.a, aacute.a, acircumflex.a, atilde.a, adieresis.a, amacron.a, abreve.a, aring.a, aogonek.a, g.a, gbreve.a, gcommaaccent.a, l.a, lacute.a, lcaron.a, lcommaaccent.a, lslash.a, fl.a, beta.a, theta.a, phi.a, De.a, Zhe.a, Ka.a, El.a, Ef.a, Yi.a, Lje.a, Kje.a, acyr.a, de.a, zhe.a, ka.a, el.a, ef.a, yi.a, lje.a, kje.a, ordfeminine.a, caroncmb.a, commabelowcmb.a, florin.a

as
De.as, Zhe.as, Ka.as, El.as, Ef.as, Yi.as, Lje.as, Kje.as

b
a.b, agrave.b, aacute.b, acircumflex.b, atilde.b, adieresis.b, amacron.b, abreve.b, aring.b, aogonek.b, acyr.b, zhe.b, ka.b, yu.b

c
be.c, ve.c, ghe.c, de.c, ze.c, icyr.c, ishort.c, pe.c, te.c, tse.c, sha.c, shcha.c, gje.c, igravecyr.c

d
Aogonek.d, Eogonek.d, aogonek.d, eogonek.d, uogonek.d, zhe.d, ka.d

ds
Aogonek.ds, Eogonek.ds

e
aogonek.e

f
aogonek.f

supa
a.supa, g.supa, l.supa

x
iogonek.x

```

I assume .supa to be equivalent to .sups.alt – in some cases I found dual suffixes to be a bit clearer to parse.