This PR improves `out_row_aligned_max_width()` in a few ways:
* It makes better use of bash's string manipulation capabilities in order to simplify the function.
* It improves the function's performance. One of the most costly parts of `out_row_aligned_max_width()` was the while loop to print each entry in the text. Since there is only one place in the code where the the entries are not all printed the same ways (the list of supported curves printed by `run_pfs()`), the PR changes `out_row_aligned_max_width()` to just return a plain text string, which the calling function prints in the appropriate way. For the curves printed by `run_pfs()`, a new function, `out_row_aligned_max_width_by_entry()` takes care of getting the output from `out_row_aligned_max_width()` and then printing each entry appropriately.
* The PR also introduces a trick so that when the TLS extensions are printed, the text for an extension won't get split across two rows. It does this by replacing the space charters within the text for an extension with "}", formatting the result with `out_row_aligned_max_width()`, and then converting the "}" back to space characters.
With the commit made on March 26, "partly (1/2) fixing #653," an HTML banner isn't added to the HTML files anymore. A banner should be added to the top of the HTML file if mass testing is being performed and a separate HTML file is being created for each test.
The `$APPEND` flag being `true` is an indicator that mass testing is being performed and that this is one of the individual tests being run. Given that `$APPEND` is `true`, `$HTMLHEADER` being `true` indicates that testssl.sh is creating the file name for the HTML output. So, it is when both flags are `true` that the HTML banner should be created.
`std_cipherlists()` does not include line breaks between tests in the output to the terminal when `$DEBUG` is 1, and it does not include line break between tests in the HTML output whenever `$DEBUG` is greater than 0.
In `create_client_simulation_tls_clienthello()` the variable `sni_extension_found` should be set if the ClientHello includes an SNI extension. Instead it was being set if and only if the ClientHello included some extension other than SNI.
This bug wasn't detected before for two reasons:
* It is rare to have a ClientHello that includes an SNI extension, but no other extensions.
* The code still works correctly if `sni_extension_found` is set even if there is no SNI in the ClientHello.
So, the bug only creates a problem if the browser's ClientHello include an SNI extension and no other extensions (see "BingPreview Jun 2014" in the client_simulation branch).
When HTML output is not being created, the print functions last step is to call `html_out()`, which responds to `return` rather than `return 0`. This causes problems for lines of code that rely on receiving a return value of 0. For example:
```
[[ $VULN_COUNT -le $VULN_THRESHLD ]] && outln && pr_headlineln " Testing for LUCKY13 vulnerability " && outln
```
This PR fixes two minor bugs:
* In `run_hpkp()`, the call to `$OPENSSL s_client` includes the option `-showcerts` twice. This PR removes one of them.
* In `get_server_certificate()`, the first call to `$OPENSSL s_client` includes `$addcmd`, but `$addcmd` has not yet been initialized. Instead, `$SNI` should be used.
Currently there is code to extract TLS extensions in three places, in `get_server_certificate()` and two places in `determine_tls_extensions()`. This PR replaces them with one new function, `extract_new_tls_extensions()`.
In order for the new function to work correctly whether OpenSSL or `tls_sockets()` is being used, this PR also changes `parse_tls_serverhello()` so that extensions are formatted in the file it creates in the same way as they are formatted by OpenSSL.
- in gerneral better performance measurements , starts from the real beginning (almost)
- allows results to put into file (MEASURE_TIME_FILE=google.txt testssl.sh google.com)
- PS4 improved: has now a performance debugging options (big solution)
- PS4 with proper alignment
- SCAN_TIME is now global so that it can be used not only by JSON-PRETTY (small performance debugging options uses it)
- prepare_debug() has now debugging stuff only, rest went to prepare_arrays()
