Fix "Hostname" parsing in OpenSSH config files, as reported
at <https://red.libssh.org/issues/260>.

From: Niels Ole Salscheider <niels_ole@salscheider-online.de>
Date: Mon, 8 May 2017 17:36:13 +0200
Subject: [PATCH] Fix reading of the first parameter

This is a fixup for 7b8b5eb4eac314a3a29be812bef0264c6611f6e7.
Previously, it would return as long as the parameter was _not_ seen
before. It also did not handle the case for the unsupported opcode (-1)
which would cause a segfault when accessing the "seen" array.
---
 src/config.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/config.c b/src/config.c
index 7c03b27..238a655 100644
--- a/src/config.c
+++ b/src/config.c
@@ -218,8 +218,9 @@ static int ssh_config_parse_line(ssh_session session, const char *line,
   }
 
   opcode = ssh_config_get_opcode(keyword);
-  if (*parsing == 1 && opcode != SOC_HOST) {
-      if (seen[opcode] == 0) {
+  if (*parsing == 1 && opcode != SOC_HOST &&
+      opcode > SOC_UNSUPPORTED && opcode < SOC_END) {
+      if (seen[opcode] == 1) {
           return 0;
       }
       seen[opcode] = 1;
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<tr><td><span title='2019-03-18 15:05:09 +0100'>2019-03-18</span></td><td><a href='/guix/commit/gnu/packages/gtk.scm?id=310dbe9ea56edcbd8244e480ae6e153b9a8672db'>gnu: gtksourceview: Update to 3.24.10.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
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<tr><td><span title='2019-02-17 03:37:48 +0100'>2019-02-17</span></td><td><a href='/guix/commit/gnu/packages/gtk.scm?id=853556831b40ae95f67fd411a19bb9a88bd4977c'>gnu: clipit: Update to 1.4.4.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
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<tr><td><span title='2019-01-28 14:57:10 +0100'>2019-01-28</span></td><td><a href='/guix/commit/gnu/packages/gtk.scm?id=0791437f972caa7e48de91ad5cb150a614f617c2'>gnu: Move most packages from guile.scm to new module.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-20 22:12:10 +0100'>2019-01-20</span></td><td><a href='/guix/commit/gnu/packages/gtk.scm?id=3e2d4e69c340c3520f546f8c7e21e52383058d1c'>Merge branch 'master' into staging</a></td><td>Ludovic Courtès</td></tr>
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