nginx_ua_block_pleroma_rejects: Back to regular expressions.

String matching didn't work.

This reverts commit e62e2c52cb.

nginx_ua_block_pleroma_rejects.sh

@@ -4,7 +4,7 @@
 # Save the output to a file and include it in an nginx configuration file. Then
 # add `if ($blockedagent) { return 403; }` to your server blocks.
 
-# Version: 2019-08-18_2
+# Version: 2019-08-18_3
 
 
 function get_domains()          # Output domains, separated by newline.
@@ -21,10 +21,11 @@ function print_entry()          # Output map entry.
 {
     local domain="${1}"
 
-    # Remove wildcards.
-    domain=$(sed 's/\*//g' <<<${domain})
+    # Transform strings to regular expressions.
+    domain=$(sed 's/\./\\./g' <<<${domain}) # . → \.
+    domain=$(sed 's/\*/.*/g' <<<${domain})  # * → .*
 
-    echo "    ^~${domain} 1;"
+    echo "    ~*${domain} 1;"
 }
 
 function main()