* bitmap2node_name_sortable - given a bitmap, build a list of comma * separated node names. names may include regular expressions * (e.g. "lx[01-10]") * IN bitmap - bitmap pointer * IN sort - returned sorted list or not * RET pointer to node list or NULL on error * globals: node_record_table_ptr - pointer to node table * NOTE: the caller must xfree the memory at node_list when no longer r
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