Document SHA1 buffer requirements more clearly
Document SHA1 buffer requirements more clearly

There's an inconsistency here; openconnect_set_xmlsha1() takes a redundant
'len' arg which serves no purpose except to check that the caller knows
how big a SHA1 is. If it's not 41, we bail.

Next time the soname is getting bumped, I'll add a similar redundant
check to openconnect_get_cert_sha1() too. I should have done that when
it was first converted from an internal function to a public-facing one
in commit 20840ab0. But I didn't, and it's not worth bumping the soname
again right now *just* for that.

Signed-off-by: David Woodhouse <b460d66aaf00c296a3db1c1d9eeafc081d5f7d70@intel.com>

brandt/openconnect,certik/openconnect,don-johnny/openconnect,chadcatlett/openconnect,cernekee/openconnect,cernekee/openconnect,lins05/openconnect,mtmiller/openconnect,matlockx/openconnect,cernekee/openconnect,mtmiller/openconnect,mveplus/openconnect-client,mtmiller/openconnect,liiir1985/openconnect,nmav/openconnect-mine,mveplus/openconnect-client,sihde/openconnect,don-johnny/openconnect,chadcatlett/openconnect,neshema/openconnect,don-johnny/openconnect,liiir1985/openconnect,cernekee/openconnect,sihde/openconnect,nmav/openconnect-mine,nmav/openconnect-mine,neshema/openconnect,atyndall/openconnect,brandt/openconnect,mtmiller/openconnect,mveplus/openconnect-client,lins05/openconnect,chadcatlett/openconnect,nmav/openconnect-mine,matlockx/openconnect,matlockx/openconnect,atyndall/openconnect,atyndall/openconnect,liiir1985/openconnect,matlockx/openconnect,don-johnny/openconnect,neshema/openconnect,lins05/openconnect,lins05/openconnect,mveplus/openconnect-client,liiir1985/openconnect,neshema/openconnect,certik/openconnect,chadcatlett/openconnect,sihde/openconnect,certik/openconnect,brandt/openconnect,brandt/openconnect,atyndall/openconnect