firebit: fix typo, homepage for keywordless, category can be missing

fixes breaking c&p typo in 24a36bc939
revert to 2 searches, but change to homepage (I completely misread the paths before, and the rows and selectors should have been edited anyway)
category can be missing on homepage (or any of the category pages)

src/Jackett.Common/Definitions/firebit.yml

@@ -5,6 +5,7 @@ description: "FireBit is an UKRAINIAN / RUSSIAN Public Torrent Tracker for MOVIE
 language: ru-RU
 type: public
 encoding: UTF-8
+requestDelay: 2
 links:
   - https://firebit.net/
 legacylinks:
@@ -65,7 +66,8 @@ download:
 search:
   # http://firebit.net/index.php?do=search&type=simple&q=2022
   paths:
-    - path: "{{ if .Keywords }}index.php?do=search&type=simple&q={{ .Keywords }}{{ else }{{ .Today.Year }}{{ end }}"
+    - path: "{{ if .Keywords }}index.php?do=search&type=simple&q={{ .Keywords }}{{ else }}{{ end }}"
+    - path: "{{ if .Keywords }}index.php?do=search&type=simple&q={{ .Keywords }}&cstart=2{{ else }}%D1%81%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D1%86%D0%B0/2/{{ end }}"
 
   rows:
     selector: "{{ if .Keywords }}table.torrents tbody tr:has(td.td-size){{ else }}div[id^=\"post-id-\"]:has(li.meta-size){{ end }}"
@@ -74,6 +76,9 @@ search:
 
   fields:
     category:
+      text: "-"
+    category|noappend:
+      optional: true
       selector: td:nth-child(1), div.article-indent div b
       filters:
         - name: replace