various shell script fixes.
add 9a, 9c, 9l wrapper scripts.
label sets label on xterm/9term
diff --git a/bin/9c b/bin/9c
new file mode 100755
index 0000000..dc9cc3d
--- /dev/null
+++ b/bin/9c
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+usegcc()
+{
+ cc=gcc
+ cflags=" \
+ -O2 \
+ -I$PLAN9/include \
+ -c \
+ -ggdb \
+ -Wall \
+ -Wno-parentheses \
+ -Wno-missing-braces \
+ -Wno-switch \
+ "
+}
+
+cc=none
+tag="`uname`-`uname -m`-${CC:-cc}"
+case "$tag" in
+*BSD*) usegcc ;;
+*Darwin*) usegcc ;;
+*HP-UX*) cc=cc; cflags="-g -O -c -Ae" ;;
+*Linux*) usegcc ;;
+*OSF1*) cc=cc; cflags="-g -O -c" ;;
+*SunOS*-cc) cc=cc; cflags="-g -O -c -xCC -D__sun__" ;;
+*SunOS*-gcc) usegcc ;;
+*)
+ echo 9c does not know how to compile on "$tag" 1>&2
+ exit 1
+esac
+
+exec cc $cflags "$@"
