5166 sendmail package should be replaceable

*** 226,234 ****
  link path=opt/onbld/bin/git-nits target=git-pbchk
  link path=opt/onbld/lib/python target=python2.6
  link path=opt/onbld/man/man1/git-nits.1 target=git-pbchk.1
  # webrev(1) requires ps2pdf
  depend fmri=print/filter/ghostscript type=require
! # hgsetup(1) uses check-hostname(1) and nightly sendmail(1M)
! depend fmri=service/network/smtp/sendmail type=require
  # nightly(1) uses wget
  depend fmri=web/wget type=require
--- 226,234 ----
  link path=opt/onbld/bin/git-nits target=git-pbchk
  link path=opt/onbld/lib/python target=python2.6
  link path=opt/onbld/man/man1/git-nits.1 target=git-pbchk.1
  # webrev(1) requires ps2pdf
  depend fmri=print/filter/ghostscript type=require
! # nightly sendmail(1M)
! depend fmri=system/network/mailwrapper type=require
  # nightly(1) uses wget
  depend fmri=web/wget type=require