Add m_override.c - an improved override module.
Revert "Add m_override.c - an improved override module."

This reverts commit f00a55e9a1005f488b3b8d8be358bcee4c975fde.
override: Remove umode +p when deopering.
Remove duplicate default-value code.

Default values for default_floodcount and default_ident_timeout are set
in s_conf.c. Remove code that checks for missing values in ircd.c.
Additionally, reset default_ident_timeout to 5 if an invalid value (i.e.
0) is provided.
helpfiles: fix spelling, grammar remove old information

What is done here:

1. All the outdated configuration flag information has been removed and
   replaced with the more current information.
2. Spellchecking has been done on all helpfiles and the actual errors
   have been fixed.
Merge pull request #41 from lyska/master

helpfiles: fix spelling, grammar remove old information
Use sha-512 rather than deprecated sha-1; generate a csr
Just use 4k RSA certificates while at it
help: Remove mention of remote commands that do not actually work.
help: Fix some required oper privileges.
Merge branch 'fix-sha256-crypt' of https://github.com/grawity/charybdis
INSTALL: Fix documentation for assert configure options.
libratbox/openssl: check that ECDHE is really available on redhat derivatives (closes #43)
Fix grammatical error
Merge pull request #45 from somasonic/master

Fix grammatical error in extensions/chm_sslonly.c
Merge pull request #42 from Argure/genssl

Use sha-512 rather than deprecated sha-1; generate a csr
WIP: document hardcoded defaults