rabbit/Makefile: Delete .html from local URL in manpages

(cherry picked from commit fe10cd8)
(cherry picked from commit 78c6a90)

Author: dumbbell

deps/rabbit/Makefile

@@ -295,6 +295,7 @@ web-manpages: $(WEB_MANPAGES) $(MD_MANPAGES)
 	    gsub(/class="D1"/, "class=\"D1 lang-bash\"", line); \
 	    gsub(/class="Bd Bd-indent"/, "class=\"Bd Bd-indent lang-bash\"", line); \
 	    gsub(/&#[xX]201[cCdD];/, "\\"", line); \
+	    gsub(/\.html/, "", line); \
 	    print line; \
 	  } } \
 	  ' > "$@"