What's new in 3.19:
*) fixed problem - web proxy used up all router memory
if unlimited ram caching was enabled;
*) fixed problem - some log topics got swapped in configuration;
*) reduced maximum supported memory for RB1000 to 1.5Gb (was 1.75Gb);
*) interface mesh was not working in 3.18, fixed;
*) fixed Prism crash;
*) fixed VPLS interface related crash in mpls-test;
*) allow to enter range in BGP instance confederation peers;
*) console - fixed '/system backup save' command, name argument is
optional, and backup file name is automatically generated if empty;
*) sped up IPv6 forwarding on RB4xx, RB1xx and RB5xx;
*) fixed BGP route selection in routing-test;
*) fixed dhcp server to update agent-circuit-id and agent-remote-id for lease
whenever it changes;
