README.md: fix license count algo, added comment about main's SRC_URI

Signed-off-by: Andreas Billmeier <b@edevau.net>

README.md

@@ -576,26 +576,26 @@ A daily compile test is run at Github with Python 3.9 to catch general faults. E
 
 ## Licenses
 This repository itself is released under GPL-3 (like most Gentoo repositories), all work on the depending components under the licenses they came from. Perhaps you came here because I filed an issue at your component about a bad or missing license. It is easy to [assign a license](https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/adding-a-license-to-a-repository). During cleanups and license investigations I have been asked often which license to choose. I am not a lawyer, but I can offer the following table, counted over this repository, perhaps this helps your decision. If a package has more than one license listed, all of them are counted.
-There are 1817 Ebuilds in total, 1806 of them have in total 1812 (34 different) licenses assigned.
+There are 1817 Ebuilds in total, 1806 of them have in total 1821 (36 different) licenses assigned.
 
 |License| Ebuilds using it|
 |-------|-----|
-|MIT|1056|
-|Apache-2.0|399|
+|MIT|1057|
+|Apache-2.0|400|
 |GPL-3|114|
-|BSD|94|
+|BSD|96|
 |LGPL-3|26|
-|GPL-2|21|
+|GPL-2|22|
 |GPL-3+|14|
 |all-rights-reserved|13|
 |LGPL-3+|12|
-|BSD-2|7|
+|BSD-2|8|
 |Unlicense|6|
 |MPL-2.0|5|
 |LGPL-2.1+|5|
 |LGPL-2.1|5|
+|PSF-2|5|
 |public-domain|4|
-|PSF-2|4|
 |EPL-1.0|3|
 |AGPL-3+|2|
 |ZPL|2|
@@ -608,8 +608,10 @@ There are 1817 Ebuilds in total, 1806 of them have in total 1812 (34 different)
 |Boost-1.0|1|
 |AGPL-3|1|
 |PSF-2.4|1|
+|ElementTree|1|
 |NEWLIB|1|
 |CC-BY-NC-SA-3.0|1|
+|Unicode-DFS-2016|1|
 |LGPL-2|1|
 |CC-BY-NC-SA-4.0|1|
 |CC0-1.0|1|