Align custom scripts with generic scripts (#445)

Align custom scripts with generic scripts, making them configurable. This has a few advantages:

- script code is more unified,
- no more hard-coded method names in scripts, which is less error prone and make it easier to rename scripts,
- no more hard coded product names in scripts, which is less error prone and make it easier to rename products,
- less hard-coded URLs and regexes in scripts, which makes auto-configuration more expressive / updatable,

Also added method `endoflife.list_configs_from_argv()` so that it is easier to manipulate scripts arguments.

src/ibm-aix.py

@@ -1,14 +1,9 @@
 from bs4 import BeautifulSoup
-from common import dates, http, releasedata
+from common import dates, endoflife, http, releasedata
 
-URLS = [
-    # Disable, it causes too many timeouts / errors
-    # "https://web.archive.org/web/20210123024247/https://www.ibm.com/support/pages/aix-support-lifecycle-information",
-    "https://www.ibm.com/support/pages/aix-support-lifecycle-information",
-]
-
-with releasedata.ProductData("ibm-aix") as product_data:
-    for page in http.fetch_urls(URLS):
+for config in endoflife.list_configs_from_argv():
+    with releasedata.ProductData(config.product) as product_data:
+        page = http.fetch_url(config.url)
         page_soup = BeautifulSoup(page.text, features="html5lib")
 
         for release_table in page_soup.find("div", class_="ibm-container-body").find_all("table", class_="ibm-data-table ibm-grid"):