Add troubleshooting article: wget/curl URLs with special characters

Covers shell quoting for URLs containing &, ?, #, and other characters
that Bash interprets as operators. Common gotcha when downloading from
CDNs with token-based URLs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

SUMMARY.md

@@ -1,6 +1,10 @@
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 created: 2026-04-02T16:03
+<<<<<<< HEAD
 updated: 2026-04-07T10:48
+=======
+updated: 2026-04-08
+>>>>>>> 4dc77d4 (Add troubleshooting article: wget/curl URLs with special characters)
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 * [Linux & Sysadmin](01-linux/index.md)
@@ -81,3 +85,4 @@ updated: 2026-04-07T10:48
     * [Ansible: SSH Timeout During dnf upgrade on Fedora Hosts](05-troubleshooting/ansible-ssh-timeout-dnf-upgrade.md)
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+    * [wget/curl: URLs with Special Characters Fail in Bash](05-troubleshooting/wget-url-special-characters.md)