Add config for uncrustify

Original: https://strcpy.net/mark/libevent-uncrustify.cfg (@ellzey)

.uncrustify

@@ -0,0 +1,55 @@
+input_tab_size                           = 8
+output_tab_size                          = 8
+indent_with_tabs                         = 2
+indent_cmt_with_tabs                     = false
+indent_brace_parent                      = false
+indent_func_call_param                   = true
+indent_func_def_param                    = true
+sp_enum_before_assign                    = add
+sp_enum_after_assign                     = add
+sp_inside_paren                          = remove
+sp_paren_brace                           = add
+sp_before_ptr_star                       = add
+sp_before_unnamed_ptr_star               = add
+sp_between_ptr_star                      = remove
+sp_after_ptr_star                        = remove
+sp_after_ptr_star_func                   = add
+sp_before_ptr_star_func                  = add
+sp_before_sparen                         = add
+sp_inside_sparen                         = remove
+sp_inside_sparen_close                   = remove
+sp_after_sparen                          = add
+sp_sparen_brace                          = add
+sp_special_semi                          = remove
+sp_before_semi_for                       = remove
+sp_after_comma                           = add
+sp_after_cast                            = remove
+sp_inside_braces_struct                  = add
+sp_type_func                             = remove
+sp_func_def_paren                        = remove
+sp_inside_fparen                         = remove
+sp_fparen_brace                          = add
+sp_func_call_paren                       = remove
+sp_else_brace                            = add
+sp_after_oc_block_caret                  = remove
+align_keep_tabs                          = true
+align_with_tabs                          = true
+align_on_tabstop                         = true
+nl_fcall_brace                           = remove
+nl_enum_brace                            = remove
+nl_struct_brace                          = remove
+nl_union_brace                           = remove
+nl_if_brace                              = remove
+nl_brace_else                            = remove
+nl_elseif_brace                          = remove
+nl_else_brace                            = remove
+nl_else_if                               = remove
+nl_for_brace                             = remove
+sp_after_semi_for_empty                  = remove
+nl_while_brace                           = remove
+nl_do_brace                              = remove
+nl_brace_while                           = remove
+nl_switch_brace                          = remove
+nl_func_type_name                        = add
+nl_fdef_brace                            = add
+mod_paren_on_return                      = ignore