Expand and correct a few code comments after Karl's review of r11211.
Expand and correct a few code comments after Karl's review of r11211.

* subversion/mod_dav_svn/liveprops.c
  (dav_svn_insert_prop, dav_svn_get_last_modified_time): Just do it.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@851306 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion