logfile irregularities #2093

1. These two sets of non feature lines should be removed...

• The first line is blank, whether with logtimestamps.
• Regardless of shrinkdebugfile, the first 2 through 20 lines of the logfile are blank and do not carry logtimestamps.

2. These entries are missing logtimestamps...

CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
CTxOut(nValue=50.00000000, scriptPubKey=04678afdb0fe5548271967f1a67130)

vMerkleTree: 4a5e1e4baa

3. vMerkleTree has an unnecessary space at the end of line.

Not sure if these still apply, lots has changed in logging in the last few months.

This is a result of how multi-line log messages are handled (as CTxIn::ToString() returns multiple lines). I'm not sure that every line should be prefixed with a new timestamp in this case as it's only one message, so prefixing only the first line makes sense in a way.