Hi,
I think man httpd_selinux is outdated in RHEL6
it looks like proper name for httpd_sys_content_rw_t is httpd_sys_rw_content_t.
at least rectorecon is trying to correct it all the time :
for example:
restorecon reset /var/www/sel_blog/wp-content/uploads/2011/01/logo-150x150.jpg context system_u:object_r:httpd_sys_rw_content_t:s0->system_u:object_r:httpd_sys_content_rw_t:s0
Vadym