1.28.1 Deactivate SIGALRM to temporarily fix timeout errors

Deactivate Python-level timeout with SIGALRM fixes #HXL-40

Prepare 1.28.1 release

HXL Proxy v.1.28

• remove controller support for adding or editing saved recipes
• request code stops running after a configurable timeout (default: 30 seconds)
• remove skip-verify-ssl option (SSL certificates for remote data must always be valid)
• add support for structured logs (e.g. JSON)
• add support for Visual Studio
• remove all frozen version requirements (except urllib3 for requests), so that we'll pull the latest packages on deployment
• get rid of warnings during user testing
• all changes from https://github.com/HXLStandard/libhxl-python/releases/tag/4.28

HXL Proxy v.1.27.3

Interim release to upgrade libhxl to 4.27.3 (decreased logging levels)

HXL Proxy v.1.27.2

Interim release, mainly around logging improvements.

• add support for structured logs (e.g. JSON)
• add support for Visual Studio

HXL Proxy v.1.27.1

• interim release to address performance issues
• change Docker config to use threads with nginx
• make root logging level configurable via ROOT_LOGGING_LEVEL config property (and default to INFO instead of DEBUG)

HXL Proxy v.1.27

• add REMOTE_ACCESS_LOGGING_LEVEL to filter "hxl.REMOTE_ACCESS" separately to show remote file access (currently, all messages will be at the INFO level)
• show the same error message for a non-existant remote data file, or for a URL that contains HTML markup; prevents bad actors from using the HXL Proxy to ping HTML websites
• don't trap 404 and HTML markup exceptions in the /data/edit endpoint
• forbid HTML markup or URLs in saved-recipe titles, descriptions, and stubs to cut down on spam attempts
• incorporate updates from https://github.com/HXLStandard/libhxl-python/releases/tag/4.27

HXL Proxy v.1.26.1

Minor bugfix release

• downgrade to mysql-connector-python==8.0.29 to avoid bug in 8.0.30

HXL Proxy v.1.26

• add MAX_REQUEST_TIMEOUT configuration option, to place a cap on the maximum allowable timeout for reading external datasets
• add LOGGING_LEVEL configuration option (defaults to "ERROR")
• log warnings for exceptions caught and returned as web pages with 400/500-series status codes
• incorporate changes in https://github.com/HXLStandard/libhxl-python/releases/tag/4.26

(Release 1.25.2)

• update to libhxl==4.25.2 to block tagger exploit

(Release 1.25.1)

• improve logging output

HXL Proxy v.1.25.2

• update to libhxl==4.25.2 to block tagger exploit

HXL Proxy v.1.25.1

• improve logging output