Gave IdentityMap<...>::next_proxy_key() the ability to find gaps in the proxy key sequence in case limit of keys is reached.
Gave IdentityMap<...>::next_proxy_key() the ability to find gaps in the proxy key sequence in case limit of keys is reached.

git-svn-id: 0231d2b9506727b8389b50bfeac72ec1f38c13c1@674 ac3cbfda-f6ac-4daa-b570-d46c5f00fc98

skybaboon/dailycashmanager,skybaboon/dailycashmanager,skybaboon/dailycashmanager