Function silc_idcache_add
SYNOPSIS
bool silc_idcache_add(SilcIDCache cache, char *name, void *id,
void *context, int expire);
DESCRIPTION
Add new entry to the cache. Returns TRUE if the entry was added and
FALSE if it could not be added. The `name' is the name associated with
the ID, the `id' the actual ID and the `context' a used specific context.
If the `expire' is TRUE the entry expires in default time and if FALSE
the entry never expires from the cache.