v3.5.5

What's Changed

• fix build with GCC 15
• securedht: avoid calling identity announced callback multiple times
• configure.ac: Fix llhttplib substituion. by @kestrelwx in #799
• fix *BSD build by @jg1uaa in #794
• Fix Autotools build by @kestrelwx in #800
• BUILD.md: add debian 13 trixie instructions by @jchdel in #805
• BUILD.md: cleanup by @ovari in #806