Revisit records with POST requests lack a POST append in their URL key

[ARiedijk]

When using the cdxj-indexer on a webpage that contains multiple different HTTP POST requests with the same response,
the cdxj-indexer will only append the URL for the response record. This means that revisit records will not have a POST append URL key.

When running the cdxj-indexer
Expected result:
com,example)/inc/postdatastatic.php?__wb_method=post&body=counter0&rnd=result1-0 20230118150449 {... "mime": "text/html"} com,example)/inc/postdatastatic.php?__wb_method=post&body=counter0&rnd=result1-1 20230118150449 {... "mime": "warc/revisit"}
Actual result
com,example)/inc/postdatastatic.php?__wb_method=post&body=counter0&rnd=result1-0 20230118150449 {... "mime": "text/html"} com,example)/inc/postdatastatic.php?rnd=result1-1 20230118150449 {... "mime": "warc/revisit"}

fix_postappend-revist.patch