Revision 335474

MFC r335133:
  In m_megapullup() use m_getjcl() to allocate 9k or 16k mbuf when requested.

  It is better to try allocate a big mbuf, than just silently drop a big
  packet. A better solution could be reworking of libalias modules to be
  able use m_copydata()/m_copyback() instead of requiring the single
  contiguous buffer.

  PR:		229006