General bug fixes
-----------------
-#### Fix an infinite loop in "notmuch reply"
+### Fix an infinite loop in "notmuch reply"
This bug could be triggered by replying to a message where the
user's primary email address did not appear in the To: header and
the user had not configured any secondary email addresses. The bug
was a simple re-use of the same iterator variable in nested loops.
-#### Fix a potential SEGV in "notmuch search"
+### Fix a potential SEGV in "notmuch search"
This bug could be triggered by an author name ending in a ','.
Admittedly - that's almost certainly a spam email, but we never
Build fix
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-#### Fix build on OpenSolaris (at least) due to missing 'extern "C"' block
+### Fix build on OpenSolaris (at least) due to missing 'extern "C"' block
Without this, the C++ sources could not find strcasestr and the
final linking of notmuch would fail.