feat: add retry policy

package/share/ahriman/settings/ahriman.ini

@@ -23,6 +23,14 @@ sync_files_database = yes
 ; as additional option for some subcommands). If set to no, databases must be synchronized manually.
 use_ahriman_cache = yes
 
+[aur]
+; Maximum amount of retries of HTTP requests.
+max_retries = 3
+; Retry exponential backoff.
+retry_backoff = 1.0
+; HTTP request timeout in seconds.
+;timeout = 30
+
 [build]
 ; List of additional flags passed to archbuild command.
 ;archbuild_flags =
@@ -73,8 +81,12 @@ enabled = yes
 ; In case if unix sockets are used, it might point to the valid socket with encoded path, e.g.:
 ;     address = http+unix://%2Fvar%2Flib%2Fahriman%2Fsocket
 ;address = http://${web:host}:${web:port}
+; Maximum amount of retries of HTTP requests.
+;max_retries = 0
 ; Optional password for authentication (if enabled).
 ;password =
+; Retry exponential backoff.
+;retry_backoff = 0.0
 ; Do not log HTTP errors if occurs.
 suppress_http_log_errors = yes
 ; HTTP request timeout in seconds.
@@ -216,6 +228,10 @@ templates[] = ${prefix}/share/ahriman/templates
 ;homepage=
 ; Prefix for packages links. Link to a package will be formed as link_path / filename.
 ;link_path =
+; Maximum amount of retries of HTTP requests.
+;max_retries = 0
+; Retry exponential backoff.
+;retry_backoff = 0.0
 ; Optional link to the RSS feed.
 ;rss_url =
 ; Template name to be used.
@@ -236,12 +252,16 @@ target =
 [github]
 ; Trigger type name.
 ;type = github
+; Maximum amount of retries of HTTP requests.
+;max_retries = 0
 ; GitHub repository owner username.
 ;owner =
 ; GitHub API key. public_repo (repo) scope is required.
 ;password =
 ; GitHub repository name.
 ;repository =
+; Retry exponential backoff.
+;retry_backoff = 0.0
 ; HTTP request timeout in seconds.
 ;timeout = 30
 ; Include repository name to release name (recommended).
@@ -253,6 +273,10 @@ target =
 [remote-service]
 ; Trigger type name.
 ;type = remote-service
+; Maximum amount of retries of HTTP requests.
+;max_retries = 0
+; Retry exponential backoff.
+;retry_backoff = 0.0
 ; HTTP request timeout in seconds.
 ;timeout = 30