The HDHomeRun will not receive and demodulate analog signals. It does not have an MPEG-2 encoder to convert analog to digital, a requirement for streaming over a digital media such as Ethernet.
If you are interested in reception of the analog signals, products such as the Hauppage HVR-1850 offer analog to digital MPEG-2 encoding hardware.
There are only three receivable digital signals listed on your report; W30CI-NBC, W25AA-PBS & W34DN-ABC. (Network affiliation per
www.rabitears.info). I don't hold much hope that an attic mounted antenna will provide reliable reception. An Antennas Direct XG-91 or Winegard HD9095P might work but I suspect one of those antennas would need to be outdoors in the clear.
Attic mounting can be attempted... but the predicted signal levels are relatively weak and at the height you ran your report at, shows the stations to be just below the horizon which makes you more susceptible to fading and multipath. If you can mount on the roof at greater height above ground, you would do well to run another TVFR based on the higher elevation.
If your situation remains as shown in your first TVFR, I would use a two antenna system. An XG-91 aimed at 34° and an Antennas Direct DB-4 or XG-43 aimed at 239°. I would equip each antenna with a CPA-18 preamp from the same vendor. I would use multiple tuners, using MythTV software to select from the appropriate tuner based on channel selection. I run such a system myself.
http://forum.tvfool.com/showthread.php?t=820
@JC, MythTV is an open source media center software suite. It is commonly run on Linux based systems although it has been ported to other OS platforms. MythTV is not "Local slang". Open source software suffers some of the same ignorance and mis/dis-information as OTA reception.
http://www.mythtv.org/
Some people would tell you your only option for computer operating systems are Microsoft and Apple... they're ignorant or they're liars.