If no content, offer list of manifest pages of same-host AUs.  Issue 2102. Fixed CLOCKSS-only NPE.  Issue 2328. Generate error page on internal errors.  (Catch exceptions while  context still in scope so sendError() invokes context ErrorHandler.) Added PlatformUtil.getLocalHostname()
If no content, offer list of manifest pages of same-host AUs.  Issue 2102.
Fixed CLOCKSS-only NPE.  Issue 2328.
Generate error page on internal errors.  (Catch exceptions while
 context still in scope so sendError() invokes context ErrorHandler.)
Added PlatformUtil.getLocalHostname()


git-svn-id: 293778eaa97c8c94097d610b1bd5133a8f478f36@5989 4f837ed2-42f5-46e7-a7a5-fa17313484d4

lockss/lockss-daemon,edina/lockss-daemon,lockss/lockss-daemon,lockss/lockss-daemon,lockss/lockss-daemon,edina/lockss-daemon,edina/lockss-daemon,edina/lockss-daemon,edina/lockss-daemon,edina/lockss-daemon,edina/lockss-daemon,lockss/lockss-daemon,lockss/lockss-daemon,lockss/lockss-daemon