stream-requirements: smoother matching in test-ssh-bundle1.t

The value of `streamreqs` changes depending of the format used, but this is not
relevant for this tests. So we doing a smarter matching of the line to avoid
this test interfering with format changes in the future.

Differential Revision: https://phab.mercurial-scm.org/D12081

tests/test-ssh-bundle1.t

@@ -475,10 +475,8 b' debug output'
   running .* ".*[/\\]dummyssh" ['"]user@dummy['"] ['"]hg -R remote serve --stdio['"] (re)
   sending hello command
   sending between command
-  remote: 444 (no-rust !)
-  remote: 463 (rust !)
-  remote: capabilities: batch branchmap $USUAL_BUNDLE2_CAPS$ changegroupsubset getbundle known lookup protocaps pushkey streamreqs=generaldelta,revlogv1,sparserevlog unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash (no-rust !)
-  remote: capabilities: batch branchmap $USUAL_BUNDLE2_CAPS$ changegroupsubset getbundle known lookup protocaps pushkey streamreqs=generaldelta,persistent-nodemap,revlogv1,sparserevlog unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash (rust !)
+  remote: \d+ (re)
+  remote: capabilities: batch branchmap \$USUAL_BUNDLE2_CAPS\$ changegroupsubset getbundle known lookup protocaps pushkey streamreqs=[^ ,]+(,[^ ,]+)* unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash (re)
   remote: 1
   sending protocaps command
   preparing listkeys for "bookmarks"