add some man pages

buffer/buffer_putalign.3

@@ -0,0 +1,16 @@
+.TH buffer_putalign 3
+.SH NAME
+buffer_putalign \- write binary data to buffer
+.SH SYNTAX
+.B #include <buffer.h>
+
+int \fBbuffer_putalign\fP(buffer* \fIb\fR,const char* \fIx\fR,unsigned int \fIlen\fR);
+.SH DESCRIPTION
+buffer_putalign is similar to buffer_put.
+
+The difference to buffer_put is that, when there isn't enough space for
+new data, buffer_put calls buffer_flush before copying any data, while
+buffer_putalign fills all available space with data before calling
+buffer_flush.
+.SH "SEE ALSO"
+buffer_put(3), buffer_putsalign(3), buffer_flush(3), buffer(3)