Update to the 'gentle SIGHUP' patch. (ITS#1679)
- Let write operations return unwilling-to-perform after 'gentle shutdown' has been initiated. - Change -1 to 2 in slapd_gentle_shutdown and slapd_shutdown, since sig_atomic_t can be unsigned (ITS#1736). The 'gentle SIGHUP' patch is older than ITS#1736 but was applied later, so it reintroduced the problem. Hallvard B. Furuseth <email@example.com>, June 2002.