Compiler warning fix

Compiler warning fix

curl_multi_socket() fix thanks to Jeff's test code

Jeff Pohlmeyer presented a *multi_socket()-using program that exposed a
problem with it (SIGSEGV-style). It clearly showed that the existing
socket-state and state-difference function was

Jeff Pohlmeyer presented a *multi_socket()-using program that exposed a
problem with it (SIGSEGV-style). It clearly showed that the existing
socket-state and state-difference function wasn't good enough so I rewrote
it and could then re-run Jeff's program without any crash. The previous
version clearly could miss to tell the application when a handle changed
from using one socket to using another.

While I was at it (as I could use this as a means to track this problem
down), I've now added a 'magic' number to the easy handle struct that is
inited at curl_easy_init() time and cleared at curl_easy_cleanup() time that
we can use internally to detect that an easy handle seems to be fine, or at
least not closed or freed (freeing in debug builds fill the area with 0x13
bytes but in normal builds we can of course not assume any particular data
in the freed areas).

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Added a useful debug function within #if 0. The function makes it easy to
"dump" a hash table which is useful when tracking problems with data stored
in one of our hashes.

Added select_test() function to allow selecting on no sockets on
Winsock.

SIGALARM -> SIGALRM.

#ifdef around alarmfunc() to supress warning.

iconv-data needs to be fully reallocated (to prevent a double-free).

Print usage in case 'arg2 == NULL'.

Duplicate iconv-data too in curl_easy_duphandle().

Compiler warning fix

Michele Bini fixed how the hostname is put in NTLM packages. As servers
don't expect fully qualified names we need to cut them off at the first dot.

tab => space

Peter Sylvester cleaned up and fixed the getsockname() uses in ftp.c. Some
of them can be completetly removed though...

signal() returns 'void (*)(int)'.

Mention that CURLOPT_MAX_RECV/SEND* were added in 7.15.5

Update comment reflecting structure change.

removed the comment that isn't valid for this file, just a copy'n paste error

Compilation fix; 'reqdata' is not a pointer. 'path' is part of SessionHandle.

test 530 is the first ever HTTP pipelining test for libcurl

Compilation fix

Major overhaul introducing http pipelining support and shared connection
cache within the multi handle.

Fix compiler warning

Invoke memanalyze from the source path and hush up about killing the FTP
server as part of test cases