title: whats the significance of /dev/log/main and /dev/log/system in android logcat?
body: <p>I usually get these two lines when i type <code>adb lolcat</code> in command line</p>
  
  <pre><code>--------- beginning of /dev/log/main
  D/dalvikvm( 2586): GC_CONCURRENT freed 651K, 7% free 12236K/13063K, paused 7ms+4ms
  D/dalvikvm( 2586): GREF has increased to 201
  W/AudioHardwareALSA( 2071): badstate and do recovery.....
  --------- beginning of /dev/log/system
  I/ActivityManager( 2159): START {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.android.mms/.ui.ConversationList bnds=[909,207][1011,300]} from pid 2586
  </code></pre>
  
  <p>What is the significance of these two things in logcat output, anything important it signifies ?Thank You</p>