convert/gnuarch: parse continuation-of revisions in gnuarch source In GNU Arch, continuation-of was often used for: - tagging revisions - continue working on a project in a new archive, because arch was scaling poorly in revision numbers (cat-logs were slow to be parsed and scanned through) - very similar to the previous point, fork his own branch of a project. Parsing this header information will allow to 'follow' new history because it often hints at older/forked/personal revision trees. This patch however just implements the parsing of the continuation-of header. A followup patch will implement the proper use of this new information.

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diff -r acd8075edac9 b

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--- /dev/null

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+++ b/b

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@@ -0,0 +1,1 @@

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+123

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diff -r acd8075edac9 b

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--- /dev/null

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+++ b/b

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@@ -0,0 +1,1 @@

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+123

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diff -r acd8075edac9 a

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--- a/a

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+++ b/a

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@@ -0,0 +1,1 @@

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+foo

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diff -r acd8075edac9 b

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--- /dev/null

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+++ b/b

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@@ -0,0 +1,1 @@

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+123

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abort: 00changelog.i@: ambiguous identifier!

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abort: 00changelog.i@: ambiguous identifier!