Description of problem:
========================
seems like with the new shd changes(shd multiplexing), the auto rotation of log files is not happening.
We need to auto rotate the shd log file as we do other log files, for easier debugging, parsing of the log file.

for example in my cluster the shd log file has grown to close to 45GB on most of the nodes and no rotation is observed

the reason of the log file growing in my setup could be with the reason of multiple heals pending, however, irrespectively, we must be rotating based on whatever is the existing policy of other log file rotations like bricklogs/glusterdlogs etc

Version-Release number of selected component (if applicable):
============================
6.0.6


Steps to Reproduce:
1. created a 6 node brickmux setup
2. created 2 1x3 volumes
3. created a  144x(4+2) ec volume
4. triggered IOs from all 6 nodes(they act as clients too)
5. observed that heals were required due to some bricks going down
6. the shd log file only keeps growing with auto rotation

[root@e24-h35-740xd glusterfs]# du -sh shd/cvlt-ecv/shd.log
44G	shd/cvlt-ecv/shd.log

Expected results:
================
autorotation of shd log files is required to help consuming the logs incase of debugging