Major update to pkg_search(1)

Major update to pkg_search(1)

- Print verbose information about packages when operating with the
  pkg_summary(5) file
- pkg_search displayed an incorrect field instead of the URL field.
- Don't download a pkg_summary(5) file if an INDEX file is available
- Honor -k when searching with -v (index file only)
- style(9) changes
- Enhanced the man page, add some comments and change my email address.
- We're on DragonFly so remove the check for DragonFly.