Switch to OpenJDK17

See merge request !61

Use minimum MTU for IPv6 session confirmed to avoid PMTU issues
Set default MTU for known IPv6 tunnel brokers
Check for s mismatch in session confirmed RI
Don't put DateTime block after Termination block
Fix first message failed check
Log sent data packet size
Log tweaks

Set max MTU for range48.org brokered addresses
Limit MTU for brokered addresses in UDPAddress also

Reduce max consecutive message failures to fail session (SSU 1/2)
Set peer as unreachable for these failures
Reduce max consectutive session confirmed retransmissions
Fix session confirmed retransmission timing
Respond to relay tag request in data phase
Log tweaks

was treating them as acks

not simply when a new file is downloaded

Move establisher and packet handler initialization
to after the address initialization

SSU2: Don't log MTU warning at startup
Remove unused dropPeerCapacities()

to reduce netdb lookups

Only throttle messages 1 and 2
Send limit response on throttle
Throttle IPv6 based on first 8 bytes only

Allow lookups of our RI even when hidden
Consolidate routerHash() calls
Remove unused router.publishUnreachableRouters option, was default true

jbigi for Apple silicon

See merge request !63

Add ability to apply patches to GMP.  Apply fix for x18 register.  Run GMP tests after build.

See merge request !62

JBigi build changes for M1

See merge request !60

Just iterate through the main map.
Log tweaks

Expire relay token quickly
Log tweaks

Fix setting local IPv6 MTU when firewalled
Fix publishing MTU when firewalled or hidden
Save local MTU when changing addresses, not when publishing
Add SSU2 MTU methods (no mod 16 required)
Allow MTU up to 1500 for SSU2 transport style
Disable SSU2 at startup if local MTU too low

see gitlab MR !59

Add code for bob rejecting alice peer test address
Don't allow MTU to exceed his MTU
Don't use a token about to expire
Send token with termination message
Add internal type to termination message
log tweaks

to make it more responsive to conditions and a more effective PMTU algorithm.
Move MTU up and down in increments rather than simply shift between min and max
Increase or decrease based on success or failure of each message
Only increase if the successful message was almost as large as current MTU
Clear increase/decrease counters when changing MTU the other way
Don't wait for 10 packets to increase MTU
Reduce max retransmissions from 30% to 10%

see earlier checkin for public keys

so as not to exceed MTU