org: unify gitignore

 .gitignore          | 4 +++-
 protocol/.gitignore | 2 --
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index b028b8c..32e32de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 zig-cache
-*.1
+protocol/*.h
+protocol/*.c
+doc/*.1
diff --git a/protocol/.gitignore b/protocol/.gitignore
deleted file mode 100644
index 68359a7..0000000
--- a/protocol/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*.c
-*.h