Fix bug where a nested clone is not possible if you don't already have a nested license in the environment.
Fix bug where a nested clone is not possible if you don't
already have a nested license in the environment.

We needed to move nested operations in clone.c until after
the repository config file has been unpacked.

bk: 4b62e0ef4LMfDRUsqNXaQU0erqkILA
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper