Revert push new heads logic This breaks push -r's new head detection but fixes the common case. For now we'll assume that someone doing push -r knows what they're doing.

adding foo
adding bomb
adding a.c
adding dir/a.o
adding dir/b.o
! a.c
! dir/a.o
! dir/b.o
? .hgignore
a.c: unsupported file type (type is fifo)
! a.c