Treat environment variable values beginning with "T" as true

So a value is true iff it begins with 'T', 't', 'Y', or 'y'.  This is
mostly so that naively converting JSON "true" to a string will work
properly, but it should keep LISPers happy too.

1 files changed, 1 insertions, 1 deletions

diff --git a/misc.c b/misc.c
index f18f17e..659de83 100644
--- a/misc.c
+++ b/misc.c
@@ -202,7 +202,7 @@ bool getenv_bool(const char *name, bool dflt)
 {
     char *env = getenv(name);
     if (env == NULL) return dflt;
-    if (env[0] == 'y' || env[0] == 'Y') return true;
+    if (strchr("yYtT", env[0])) return true;
     return false;
 }