René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Link Header pagination fails when there's no space between ';' and 'rel'","articleBody":"If links in a Link header do not contain a space between `;` and `rel` then invoke-webrequest fails to populate the RelationLink property \r\n```\r\n\u003chttp://localhost:8080/PowerShell?test=linkheader\u0026maxlinks=5\u0026linknumber=1\u003e; rel=\"self\"\r\n\u003chttp://localhost:8080/PowerShell?test=linkheader\u0026maxlinks=5\u0026linknumber=1\u003e;rel=\"self\"\r\n```\r\nNot having a space is valid (more appropriate, even) per the specification: https://tools.ietf.org/html/rfc5988 page 6\r\n\r\n### For reference \r\n  #5265 [Feature] Add Multiple Link Header Support \r\n#### Code\r\nhttps://github.com/PowerShell/PowerShell/blob/9e99d596212bc6e2b92af6700889f7698492474d/src/Microsoft.PowerShell.Commands.Utility/commands/utility/WebCmdlet/CoreCLR/WebRequestPSCmdlet.CoreClr.cs#L835\r\n#### Test\r\nhttps://github.com/PowerShell/PowerShell/blob/9e99d596212bc6e2b92af6700889f7698492474d/test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1#L797\r\n\r\nI think the appropriate fix would be to change `\\\\s` to `\\\\s*` to allow for 0 or more whitespace rather than requiring a single whitespace \r\n\r\n- Current regex not working: https://regex101.com/r/QbglHf/1\r\n- Proposed modification: https://regex101.com/r/QbglHf/2\r\n","author":{"url":"https://github.com/cruscio","@type":"Person","name":"cruscio"},"datePublished":"2017-12-11T13:18:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/5667/PowerShell/issues/5667"}