conserver: update to version 8.3.0

conserver: update to version 8.3.0

version 8.3.0 (February 2, 2026):
        - Don't use `true` variable (Stanisław Pitucha <redacted>)
        - Add VPATH to Makefile.in (saproj <redacted>)
        - FileUnopen: always return a valid file descriptor (Jeff Moyer <redacted>)
        - fix SEGFAULT on early exit with IPv6 enabled (Bjørn Mork <redacted>)
        - In AddrsMatch, keep copies of addrinfos to free. (Darren Tucker <redacted>)
        - Increase buffer size for GSSAPI exchanges (Alexander Bokovoy <redacted>)
        - Show "(inactive)" rather than an invalid pty device name for ondemand consoles that
          are closed. Show "(inactive)" rather than "(null)" for ondemand consoles that have
          never been opened. (Greg Becker <redacted>)
        - Prevent spy-mode clients from being promoted to the attached/writable state. (Greg Becker <redacted>)
        - autoconf upgrade (Jörg Sommer <redacted>)
        - reinitcheck allows time units (Jacek Tomasiak <redacted>)
        - reduce level of string alloc management debug messages (Greg A. Woods <redacted>)
        - fix bug with parser and "#" lines, fix debug output in ParseFile()
        - Fix clobbering of breaklist and replstring (Anton Lundin <redacted>)
        - Use strcmp() rather than strcasecmp() to compare console names when reading the config
          file and creating the list of consoles. (Greg Becker <redacted>)
        - Added passwordfile config option (Jason Ni <redacted>)

Drop upstreamed patches:
  002-addrsmatch-freeaddrinfo.patch
  002-fix-SEGFAULT-on-early-exit-with-IPv6-enabled.patch

Signed-off-by: Bjørn Mork <redacted>