Release rescached v4.4.1 (2023-04-01)

===  Enhancements

* go.mod: set Go version to 1.19 and update share module

  The latest share module has several fixes and enhancements regarding
  DNS library, including

  * lib/dns: simplify unpackDomainName return value for end
  * lib/dns: use the packet length to derive current offset
  * lib/dns: handle zone file with CRLF line ending
  * lib/dns: allow parsing TXT rdata without quote in zone file
  * lib/dns: fix parsing SRV record from zone file
  * lib/dns: fix packing and unpacking resource record HINFO
  * lib/dns: fix packing, parsing, and saving MINFO resource data

* _www/doc: update the index and resolver documentation
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