SSU: Don't wakeup OMF after ack if no more messages are pending

More light theme CSS tweaks to table headings and table spacing on /config*, switch from uppercase to capitalize for titles on SusiMail

i2ptunnel: Remove dup link to nonexistent theme favicon.ico

Lighten up some borders on /home, improve consistency of backgrounds on /home, header margins on apps on homepages

https://bugs.launchpad.net/ubuntu/+source/i2p/+bug/1784023

The #ls2 team plans to change the specification and re-enable after the 0.9.48 release

Backport JavaVersion.java from Jetty 9.4.34
Jetty does not plan to fix in 9.3.x
ref:
https://github.com/eclipse/jetty.project/issues/5682
https://github.com/eclipse/jetty.project/issues/2284
http://zzz.i2p/topics/2991

Merge in javadoc fixes

Fixup test as required

All binaries from Tanuki Delta Pack Community Edition,
except for armhf (armv6), compiled on Raspberry Pi:
  ant 1.8.2
  javac 1.7.0_151
  gcc 4.6.3-14+rpi1

Windows binaries remain unchanged as we must recompile them ourselves
(32 bit just to change the icon; 64 bit is not provided by Tanuki)

PPC 32-bit big endian not updated, no longer supported by Tanuki